244 files changed, 251 insertions, 209 deletions

diff --git a/meap/ch7.bak/Cargo.lock b/meap/ch7.bak/Cargo.lock
new file mode 100755
index 0000000..652669e
--- /dev/null
+++ b/meap/ch7.bak/Cargo.lock
@@ -0,0 +1,111 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "autocfg"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bincode"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "byteorder"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "ch7"
+version = "0.1.0"
+dependencies = [
+ "bincode 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro2"
+version = "0.4.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "0.6.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.28 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ryu"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde"
+version = "1.0.90"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde_derive"
+version = "1.0.90"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.32 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "0.15.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a6d640bee2da49f60a4068a7fae53acde8982514ab7bae8b8cea9e88cbcfd799"
+"checksum bincode 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "959c8e54c1ad412ffeeb95f05a9cade02d2d40a7b3c2f852d3353148f4beff35"
+"checksum byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a019b10a2a7cdeb292db131fc8113e57ea2a908f6e7894b0c3c671893b65dbeb"
+"checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
+"checksum proc-macro2 0.4.28 (registry+https://github.com/rust-lang/crates.io-index)" = "ba92c84f814b3f9a44c5cfca7d2ad77fa10710867d2bbb1b3d175ab5f47daa12"
+"checksum quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
+"checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
+"checksum serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)" = "aa5f7c20820475babd2c077c3ab5f8c77a31c15e16ea38687b4c02d3e48680f4"
+"checksum serde_derive 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)" = "58fc82bec244f168b23d1963b45c8bf5726e9a15a9d146a067f9081aeed2de79"
+"checksum serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)" = "5a23aa71d4a4d43fdbfaac00eff68ba8a06a51759a89ac3304323e800c4dd40d"
+"checksum syn 0.15.32 (registry+https://github.com/rust-lang/crates.io-index)" = "846620ec526c1599c070eff393bfeeeb88a93afa2513fc3b49f1fea84cf7b0ed"
+"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
diff --git a/meap/ch7.bak/Cargo.toml b/meap/ch7.bak/Cargo.toml
new file mode 100755
index 0000000..dc520fc
--- /dev/null
+++ b/meap/ch7.bak/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "ch7"
+version = "0.1.0"
+authors = ["Adam Carpenter <53hornet@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+bincode = "~1.1.3"
+serde = "~1.0.90"
+serde_derive = "~1.0.90"
+serde_json = "~1.0.39"
+
diff --git a/meap/ch7.bak/src/main.rs b/meap/ch7.bak/src/main.rs
new file mode 100755
index 0000000..1dbb471
--- /dev/null
+++ b/meap/ch7.bak/src/main.rs
@@ -0,0 +1,100 @@
+//#[macro_use]
+//extern crate serde_derive;
+//
+//extern crate serde;
+//extern crate serde_json;
+//extern crate bincode;
+//
+//#[derive(Serialize, Deserialize)]
+//struct City {
+//    name: String,
+//    population: usize,
+//    latitude: f64,
+//    longitude: f64,
+//}
+//
+//fn main() {
+//    let calabar = City {
+//        name: String::from("Calabar"),
+//        population: 470_000,
+//        latitude: 4.95,
+//        longitude: 8.33,
+//    };
+//
+//    let as_json = serde_json::to_string(&calabar).unwrap();
+//    let as_bincode = bincode::serialize(&calabar).unwrap();
+//
+//    println!("json: {}", &as_json);
+//    println!("bincode: {:?}", &as_bincode);
+//    println!("bincode utf8: {:?}", String::from_utf8_lossy(&as_bincode));
+//}
+
+
+//use std::io::prelude::*;
+//
+//const BYTES_PER_LINE: usize = 16;
+//const INPUT: &'static [u8] = br#"
+//
+//fn main() {
+//    println!("hello world")
+//}"#;
+//
+//fn main() -> std::io::Result<()> {
+//    let mut buffer: Vec<u8> = vec!();
+//    INPUT.read_to_end(&mut buffer)?;
+//
+//    let mut position_in_input = 0;
+//    
+//    for line in buffer.chunks(BYTES_PER_LINE) {
+//        print!("[0x{:08x}] ", position_in_input);
+//
+//        for byte in line {
+//            print!("{:02x} ", byte);
+//        }
+//
+//        println!();
+//        position_in_input += BYTES_PER_LINE;
+//    }
+//
+//    Ok(())
+//}
+
+
+//use std::fs::File;
+//use std::io::prelude::*;
+//use std::env;
+//
+//const BYTES_PER_LINE: usize = 16;
+//
+//fn main() {
+//    let arg1 = env::args().nth(1);
+//    let fname = arg1.expect("usage: fview FILENAME");
+//
+//    let mut f = File::open(&fname).expect("unable to open file");
+//    let mut pos = 0;
+//    let mut buffer = [0; BYTES_PER_LINE];
+//
+//    while let Ok(_) = f.read_exact(&mut buffer) {
+//        print!("[0x{:08x}] ", pos);
+//        
+//        for byte in &buffer {
+//            match *byte {
+//                0x00 => print!(".  "),
+//                0xff => print!("## "),
+//                _ => print!("{:02x} ", byte),
+//            }
+//        }
+//
+//        println!("");
+//        pos += BYTES_PER_LINE;
+//    }
+//}
+
+
+use std::path::PathBuf;
+
+fn main() {
+    let mut hello = PathBuf::from("/tmp/hello.txt");
+    hello.pop();
+    println!("{:?}", hello.display());
+}
diff --git a/meap/ch7.bak/target/.rustc_info.json b/meap/ch7.bak/target/.rustc_info.json
new file mode 100755
index 0000000..2bb58e7
--- /dev/null
+++ b/meap/ch7.bak/target/.rustc_info.json
@@ -0,0 +1 @@
+{"rustc_fingerprint":5361904215157244162,"outputs":{"15337506775154344876":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/usr\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""],"1164083562126845933":["rustc 1.34.0\nbinary: rustc\ncommit-hash: unknown\ncommit-date: unknown\nhost: x86_64-unknown-linux-gnu\nrelease: 1.34.0\nLLVM version: 8.0\n",""],"1617349019360157463":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/usr\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""]},"successes":{}}
\ No newline at end of file
diff --git a/meap/ch7/target/debug/build/bincode-83548ed339649500/stderr b/meap/ch7.bak/target/debug/.cargo-lock
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/bincode-83548ed339649500/stderr
+++ b/meap/ch7.bak/target/debug/.cargo-lock
diff --git a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/dep-lib-autocfg-decc8dda373d483a b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/dep-lib-autocfg-decc8dda373d483a
index 63c2b20..63c2b20 100755
--- a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/dep-lib-autocfg-decc8dda373d483a
+++ b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/dep-lib-autocfg-decc8dda373d483a
diff --git a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a
index 536ec5c..536ec5c 100755
--- a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a
+++ b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a
diff --git a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a.json b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a.json
index eaf4fcb..eaf4fcb 100755
--- a/meap/ch7/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/autocfg-decc8dda373d483a/lib-autocfg-decc8dda373d483a.json
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/dep-lib-bincode-6b7b5bba40374a3a b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/dep-lib-bincode-6b7b5bba40374a3a
index 5490afb..5490afb 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/dep-lib-bincode-6b7b5bba40374a3a
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/dep-lib-bincode-6b7b5bba40374a3a
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a
index f2aecf2..f2aecf2 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a.json b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a.json
index 9ce9e47..9ce9e47 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-6b7b5bba40374a3a/lib-bincode-6b7b5bba40374a3a.json
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7 b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7
index 94889bc..94889bc 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7.json b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7.json
index 3cfbc42..3cfbc42 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/build-script-build_script_build-75abd544b82202c7.json
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/dep-build-script-build_script_build-75abd544b82202c7 b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/dep-build-script-build_script_build-75abd544b82202c7
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/dep-build-script-build_script_build-75abd544b82202c7
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/dep-build-script-build_script_build-75abd544b82202c7
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-75abd544b82202c7/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-75abd544b82202c7/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-83548ed339649500/build b/meap/ch7.bak/target/debug/.fingerprint/bincode-83548ed339649500/build
index 886ae36..886ae36 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-83548ed339649500/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-83548ed339649500/build
diff --git a/meap/ch7/target/debug/.fingerprint/bincode-83548ed339649500/build.json b/meap/ch7.bak/target/debug/.fingerprint/bincode-83548ed339649500/build.json
index 545af9f..545af9f 100755
--- a/meap/ch7/target/debug/.fingerprint/bincode-83548ed339649500/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/bincode-83548ed339649500/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90 b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90
index e751260..e751260 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90.json b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90.json
index 8c785d8..8c785d8 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/build-script-build_script_build-3334579af8660d90.json
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/dep-build-script-build_script_build-3334579af8660d90 b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/dep-build-script-build_script_build-3334579af8660d90
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/dep-build-script-build_script_build-3334579af8660d90
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/dep-build-script-build_script_build-3334579af8660d90
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-3334579af8660d90/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-3334579af8660d90/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/dep-lib-byteorder-db47f374fba3e668 b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/dep-lib-byteorder-db47f374fba3e668
index fa910b8..fa910b8 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/dep-lib-byteorder-db47f374fba3e668
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/dep-lib-byteorder-db47f374fba3e668
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668 b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668
index 8829ebb..8829ebb 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668.json b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668.json
index 5840dcc..5840dcc 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-db47f374fba3e668/lib-byteorder-db47f374fba3e668.json
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-e36e243baec1e418/build b/meap/ch7.bak/target/debug/.fingerprint/byteorder-e36e243baec1e418/build
index 8d7cd65..8d7cd65 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-e36e243baec1e418/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-e36e243baec1e418/build
diff --git a/meap/ch7/target/debug/.fingerprint/byteorder-e36e243baec1e418/build.json b/meap/ch7.bak/target/debug/.fingerprint/byteorder-e36e243baec1e418/build.json
index 598f13e..598f13e 100755
--- a/meap/ch7/target/debug/.fingerprint/byteorder-e36e243baec1e418/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/byteorder-e36e243baec1e418/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b
index 4a03bc1..4a03bc1 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b.json b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b.json
index 3190374..3190374 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/bin-ch7-1c5228b4d239172b.json
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/dep-bin-ch7-1c5228b4d239172b b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/dep-bin-ch7-1c5228b4d239172b
index e046c38..e046c38 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/dep-bin-ch7-1c5228b4d239172b
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/dep-bin-ch7-1c5228b4d239172b
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-1c5228b4d239172b/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-1c5228b4d239172b/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a
index 27f747b..27f747b 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a.json b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a.json
index e778881..e778881 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/bin-ch7-a37416d8bab1527a.json
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/dep-bin-ch7-a37416d8bab1527a b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/dep-bin-ch7-a37416d8bab1527a
index e046c38..e046c38 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/dep-bin-ch7-a37416d8bab1527a
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/dep-bin-ch7-a37416d8bab1527a
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/ch7-a37416d8bab1527a/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/ch7-a37416d8bab1527a/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/dep-lib-itoa-91435f2d9a5c9d2d b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/dep-lib-itoa-91435f2d9a5c9d2d
index b8e6181..b8e6181 100755
--- a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/dep-lib-itoa-91435f2d9a5c9d2d
+++ b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/dep-lib-itoa-91435f2d9a5c9d2d
diff --git a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d
index d5260ed..d5260ed 100755
--- a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d
+++ b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d
diff --git a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d.json b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d.json
index 7389109..7389109 100755
--- a/meap/ch7/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/itoa-91435f2d9a5c9d2d/lib-itoa-91435f2d9a5c9d2d.json
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build
index 63111b4..63111b4 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build.json b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build.json
index 7afdc6f..7afdc6f 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-4a0c23a5952ba078/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/dep-lib-proc_macro2-855c77c462de1b7d b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/dep-lib-proc_macro2-855c77c462de1b7d
index 47c9291..47c9291 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/dep-lib-proc_macro2-855c77c462de1b7d
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/dep-lib-proc_macro2-855c77c462de1b7d
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d
index 8d4c84f..8d4c84f 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d.json b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d.json
index 6478a16..6478a16 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-855c77c462de1b7d/lib-proc_macro2-855c77c462de1b7d.json
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8 b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8
index 6db1714..6db1714 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8.json b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8.json
index adb6c2e..adb6c2e 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/build-script-build_script_build-d0656b3749ea87d8.json
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/dep-build-script-build_script_build-d0656b3749ea87d8 b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/dep-build-script-build_script_build-d0656b3749ea87d8
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/dep-build-script-build_script_build-d0656b3749ea87d8
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/dep-build-script-build_script_build-d0656b3749ea87d8
diff --git a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/proc-macro2-d0656b3749ea87d8/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/dep-lib-quote-1cc9e04a7169e4c6 b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/dep-lib-quote-1cc9e04a7169e4c6
index e7b9ade..e7b9ade 100755
--- a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/dep-lib-quote-1cc9e04a7169e4c6
+++ b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/dep-lib-quote-1cc9e04a7169e4c6
diff --git a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6 b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6
index 7e5a89d..7e5a89d 100755
--- a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6
+++ b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6
diff --git a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6.json b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6.json
index 7c4fa8b..7c4fa8b 100755
--- a/meap/ch7/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/quote-1cc9e04a7169e4c6/lib-quote-1cc9e04a7169e4c6.json
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287 b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287
index 9575b6c..9575b6c 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287.json b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287.json
index f12ac79..f12ac79 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/build-script-build_script_build-72e8712795d4c287.json
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/dep-build-script-build_script_build-72e8712795d4c287 b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/dep-build-script-build_script_build-72e8712795d4c287
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/dep-build-script-build_script_build-72e8712795d4c287
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/dep-build-script-build_script_build-72e8712795d4c287
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-72e8712795d4c287/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-72e8712795d4c287/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/dep-lib-ryu-b730c6c70ac3e2cc b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/dep-lib-ryu-b730c6c70ac3e2cc
index a5c0de4..a5c0de4 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/dep-lib-ryu-b730c6c70ac3e2cc
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/dep-lib-ryu-b730c6c70ac3e2cc
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc
index 0714894..0714894 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc.json b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc.json
index 3e12b65..3e12b65 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-b730c6c70ac3e2cc/lib-ryu-b730c6c70ac3e2cc.json
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build b/meap/ch7.bak/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build
index 7705c07..7705c07 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build
diff --git a/meap/ch7/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build.json b/meap/ch7.bak/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build.json
index 4644ebc..4644ebc 100755
--- a/meap/ch7/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/ryu-e39a5475b4dfbd3a/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/dep-lib-serde-0aeb5a4b9a73de73 b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/dep-lib-serde-0aeb5a4b9a73de73
index 236a594..236a594 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/dep-lib-serde-0aeb5a4b9a73de73
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/dep-lib-serde-0aeb5a4b9a73de73
diff --git a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73 b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73
index 594c5d2..594c5d2 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73
diff --git a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73.json b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73.json
index 78e8d6e..78e8d6e 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-0aeb5a4b9a73de73/lib-serde-0aeb5a4b9a73de73.json
diff --git a/meap/ch7/target/debug/.fingerprint/serde-993a19abfeb02743/build b/meap/ch7.bak/target/debug/.fingerprint/serde-993a19abfeb02743/build
index 4ad8e67..4ad8e67 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-993a19abfeb02743/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-993a19abfeb02743/build
diff --git a/meap/ch7/target/debug/.fingerprint/serde-993a19abfeb02743/build.json b/meap/ch7.bak/target/debug/.fingerprint/serde-993a19abfeb02743/build.json
index ff5505e..ff5505e 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-993a19abfeb02743/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-993a19abfeb02743/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42 b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42
index 70e977f..70e977f 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42
diff --git a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42.json b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42.json
index f1f5990..f1f5990 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/build-script-build_script_build-afe5df83afa18d42.json
diff --git a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/dep-build-script-build_script_build-afe5df83afa18d42 b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/dep-build-script-build_script_build-afe5df83afa18d42
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/dep-build-script-build_script_build-afe5df83afa18d42
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/dep-build-script-build_script_build-afe5df83afa18d42
diff --git a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/serde-afe5df83afa18d42/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde-afe5df83afa18d42/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/dep-lib-serde_derive-e5b7d25063e53202 b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/dep-lib-serde_derive-e5b7d25063e53202
index 7628b3d..7628b3d 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/dep-lib-serde_derive-e5b7d25063e53202
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/dep-lib-serde_derive-e5b7d25063e53202
diff --git a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202 b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202
index d35e9a0..d35e9a0 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202
diff --git a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202.json b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202.json
index 922286b..922286b 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_derive-e5b7d25063e53202/lib-serde_derive-e5b7d25063e53202.json
diff --git a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/dep-lib-serde_json-2d6c62b2bd77dda0 b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/dep-lib-serde_json-2d6c62b2bd77dda0
index 8d91c4c..8d91c4c 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/dep-lib-serde_json-2d6c62b2bd77dda0
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/dep-lib-serde_json-2d6c62b2bd77dda0
diff --git a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0 b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0
index 2f59e91..2f59e91 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0
diff --git a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0.json b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0.json
index 8503186..8503186 100755
--- a/meap/ch7/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/serde_json-2d6c62b2bd77dda0/lib-serde_json-2d6c62b2bd77dda0.json
diff --git a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/dep-lib-syn-68015be05f89a0f5 b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/dep-lib-syn-68015be05f89a0f5
index 47c5fe1..47c5fe1 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/dep-lib-syn-68015be05f89a0f5
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/dep-lib-syn-68015be05f89a0f5
diff --git a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5 b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5
index 71889ad..71889ad 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5
diff --git a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5.json b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5.json
index 096aaa2..096aaa2 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-68015be05f89a0f5/lib-syn-68015be05f89a0f5.json
diff --git a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a
index e1a896c..e1a896c 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a
diff --git a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a.json b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a.json
index 277e715..277e715 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/build-script-build_script_build-a900233370d9690a.json
diff --git a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/dep-build-script-build_script_build-a900233370d9690a b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/dep-build-script-build_script_build-a900233370d9690a
index 1b1b374..1b1b374 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/dep-build-script-build_script_build-a900233370d9690a
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/dep-build-script-build_script_build-a900233370d9690a
diff --git a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-a900233370d9690a/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-a900233370d9690a/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/syn-c1294e2186cf9b28/build b/meap/ch7.bak/target/debug/.fingerprint/syn-c1294e2186cf9b28/build
index f8c42c2..f8c42c2 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-c1294e2186cf9b28/build
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-c1294e2186cf9b28/build
diff --git a/meap/ch7/target/debug/.fingerprint/syn-c1294e2186cf9b28/build.json b/meap/ch7.bak/target/debug/.fingerprint/syn-c1294e2186cf9b28/build.json
index cf04f50..cf04f50 100755
--- a/meap/ch7/target/debug/.fingerprint/syn-c1294e2186cf9b28/build.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/syn-c1294e2186cf9b28/build.json
diff --git a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/dep-lib-unicode_xid-12657c7cced582bd b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/dep-lib-unicode_xid-12657c7cced582bd
index 7e45eb6..7e45eb6 100755
--- a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/dep-lib-unicode_xid-12657c7cced582bd
+++ b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/dep-lib-unicode_xid-12657c7cced582bd
diff --git a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/invoked.timestamp b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/invoked.timestamp
diff --git a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd
index e3f9a8e..e3f9a8e 100755
--- a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd
+++ b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd
diff --git a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd.json b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd.json
index b5dc298..b5dc298 100755
--- a/meap/ch7/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd.json
+++ b/meap/ch7.bak/target/debug/.fingerprint/unicode-xid-12657c7cced582bd/lib-unicode_xid-12657c7cced582bd.json
diff --git a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build-script-build b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build-script-build
index beb025c..beb025c 100755
--- a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build-script-build
+++ b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build-script-build
diff --git a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7 b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7
index beb025c..beb025c 100755
--- a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7
+++ b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7
diff --git a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7.d b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7.d
index 99c607f..99c607f 100755
--- a/meap/ch7/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7.d
+++ b/meap/ch7.bak/target/debug/build/bincode-75abd544b82202c7/build_script_build-75abd544b82202c7.d
diff --git a/meap/ch7/target/debug/build/bincode-83548ed339649500/invoked.timestamp b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/build/bincode-83548ed339649500/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/invoked.timestamp
diff --git a/meap/ch7/target/debug/build/bincode-83548ed339649500/out/probe0.ll b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/out/probe0.ll
index 27d9234..27d9234 100755
--- a/meap/ch7/target/debug/build/bincode-83548ed339649500/out/probe0.ll
+++ b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/out/probe0.ll
diff --git a/meap/ch7/target/debug/build/bincode-83548ed339649500/output b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/output
index 0741bb4..0741bb4 100755
--- a/meap/ch7/target/debug/build/bincode-83548ed339649500/output
+++ b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/output
diff --git a/meap/ch7/target/debug/build/bincode-83548ed339649500/root-output b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/root-output
index ea5b190..ea5b190 100755
--- a/meap/ch7/target/debug/build/bincode-83548ed339649500/root-output
+++ b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/root-output
diff --git a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/stderr b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/stderr
+++ b/meap/ch7.bak/target/debug/build/bincode-83548ed339649500/stderr
diff --git a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build-script-build b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build-script-build
index 79876ba..79876ba 100755
--- a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build-script-build
+++ b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build-script-build
diff --git a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90 b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90
index 79876ba..79876ba 100755
--- a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90
+++ b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90
diff --git a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90.d b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90.d
index 6a5bdc9..6a5bdc9 100755
--- a/meap/ch7/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90.d
+++ b/meap/ch7.bak/target/debug/build/byteorder-3334579af8660d90/build_script_build-3334579af8660d90.d
diff --git a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/invoked.timestamp b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/invoked.timestamp
diff --git a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/output b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/output
index 5748576..5748576 100755
--- a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/output
+++ b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/output
diff --git a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/root-output b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/root-output
index fb73627..fb73627 100755
--- a/meap/ch7/target/debug/build/byteorder-e36e243baec1e418/root-output
+++ b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/root-output
diff --git a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/stderr b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/stderr
+++ b/meap/ch7.bak/target/debug/build/byteorder-e36e243baec1e418/stderr
diff --git a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/invoked.timestamp b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/invoked.timestamp
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/invoked.timestamp
diff --git a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/output b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/output
index 1a4a08e..1a4a08e 100755
--- a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/output
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/output
diff --git a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/root-output b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/root-output
index 9324dcc..9324dcc 100755
--- a/meap/ch7/target/debug/build/proc-macro2-4a0c23a5952ba078/root-output
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/root-output
diff --git a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/stderr b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/stderr
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-4a0c23a5952ba078/stderr
diff --git a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build-script-build b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build-script-build
index 7fa51d6..7fa51d6 100755
--- a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build-script-build
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build-script-build
diff --git a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8 b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8
index 7fa51d6..7fa51d6 100755
--- a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8
diff --git a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8.d b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8.d
index 993a518..993a518 100755
--- a/meap/ch7/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8.d
+++ b/meap/ch7.bak/target/debug/build/proc-macro2-d0656b3749ea87d8/build_script_build-d0656b3749ea87d8.d
diff --git a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build-script-build b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build-script-build
index fef85d2..fef85d2 100755
--- a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build-script-build
+++ b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build-script-build
diff --git a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287 b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287
index fef85d2..fef85d2 100755
--- a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287
+++ b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287
diff --git a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287.d b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287.d
index 61f5c37..61f5c37 100755
--- a/meap/ch7/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287.d
+++ b/meap/ch7.bak/target/debug/build/ryu-72e8712795d4c287/build_script_build-72e8712795d4c287.d
diff --git a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/invoked.timestamp b/meap/ch7.bak/target/debug/build/ryu-e39a5475b4dfbd3a/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/invoked.timestamp
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diff --git a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/output b/meap/ch7.bak/target/debug/build/ryu-e39a5475b4dfbd3a/output
index 69a135a..69a135a 100755
--- a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/output
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diff --git a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/root-output b/meap/ch7.bak/target/debug/build/ryu-e39a5475b4dfbd3a/root-output
index 3552c2c..3552c2c 100755
--- a/meap/ch7/target/debug/build/ryu-e39a5475b4dfbd3a/root-output
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diff --git a/meap/ch7/target/debug/build/serde-993a19abfeb02743/stderr b/meap/ch7.bak/target/debug/build/ryu-e39a5475b4dfbd3a/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/serde-993a19abfeb02743/stderr
+++ b/meap/ch7.bak/target/debug/build/ryu-e39a5475b4dfbd3a/stderr
diff --git a/meap/ch7/target/debug/build/serde-993a19abfeb02743/invoked.timestamp b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/invoked.timestamp
index e00328d..e00328d 100755
--- a/meap/ch7/target/debug/build/serde-993a19abfeb02743/invoked.timestamp
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diff --git a/meap/ch7/target/debug/build/serde-993a19abfeb02743/output b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/output
index 7967aca..7967aca 100755
--- a/meap/ch7/target/debug/build/serde-993a19abfeb02743/output
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diff --git a/meap/ch7/target/debug/build/serde-993a19abfeb02743/root-output b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/root-output
index e195701..e195701 100755
--- a/meap/ch7/target/debug/build/serde-993a19abfeb02743/root-output
+++ b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/root-output
diff --git a/meap/ch7/target/debug/build/syn-c1294e2186cf9b28/stderr b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/build/syn-c1294e2186cf9b28/stderr
+++ b/meap/ch7.bak/target/debug/build/serde-993a19abfeb02743/stderr
diff --git a/meap/ch7/target/debug/build/serde-afe5df83afa18d42/build-script-build b/meap/ch7.bak/target/debug/build/serde-afe5df83afa18d42/build-script-build
index 3f4ef86..3f4ef86 100755
--- a/meap/ch7/target/debug/build/serde-afe5df83afa18d42/build-script-build
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diff --git a/meap/ch7/target/debug/build/serde-afe5df83afa18d42/build_script_build-afe5df83afa18d42 b/meap/ch7.bak/target/debug/build/serde-afe5df83afa18d42/build_script_build-afe5df83afa18d42
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diff --git a/meap/ch7/target/debug/build/serde-afe5df83afa18d42/build_script_build-afe5df83afa18d42.d b/meap/ch7.bak/target/debug/build/serde-afe5df83afa18d42/build_script_build-afe5df83afa18d42.d
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+++ b/meap/ch7.bak/target/debug/build/serde-afe5df83afa18d42/build_script_build-afe5df83afa18d42.d
diff --git a/meap/ch7/target/debug/build/syn-a900233370d9690a/build-script-build b/meap/ch7.bak/target/debug/build/syn-a900233370d9690a/build-script-build
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diff --git a/meap/ch7/target/debug/build/syn-a900233370d9690a/build_script_build-a900233370d9690a b/meap/ch7.bak/target/debug/build/syn-a900233370d9690a/build_script_build-a900233370d9690a
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diff --git a/meap/ch7/target/debug/build/syn-a900233370d9690a/build_script_build-a900233370d9690a.d b/meap/ch7.bak/target/debug/build/syn-a900233370d9690a/build_script_build-a900233370d9690a.d
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diff --git a/meap/ch7/target/debug/build/syn-c1294e2186cf9b28/invoked.timestamp b/meap/ch7.bak/target/debug/build/syn-c1294e2186cf9b28/invoked.timestamp
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diff --git a/meap/ch7/target/debug/build/syn-c1294e2186cf9b28/output b/meap/ch7.bak/target/debug/build/syn-c1294e2186cf9b28/output
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diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux.lock b/meap/ch7.bak/target/debug/build/syn-c1294e2186cf9b28/stderr
index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux.lock
+++ b/meap/ch7.bak/target/debug/build/syn-c1294e2186cf9b28/stderr
diff --git a/meap/ch7/target/debug/deps/ch7-a37416d8bab1527a b/meap/ch7.bak/target/debug/ch7
index 1466191..1466191 100755
--- a/meap/ch7/target/debug/deps/ch7-a37416d8bab1527a
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diff --git a/meap/ch7.bak/target/debug/ch7.d b/meap/ch7.bak/target/debug/ch7.d
new file mode 100755
index 0000000..5b5e606
--- /dev/null
+++ b/meap/ch7.bak/target/debug/ch7.d
@@ -0,0 +1 @@
+/home/carpenat/devel/learning-rust/meap/ch7/target/debug/ch7: /home/carpenat/devel/learning-rust/meap/ch7/src/main.rs
diff --git a/meap/ch7/target/debug/deps/autocfg-decc8dda373d483a.d b/meap/ch7.bak/target/debug/deps/autocfg-decc8dda373d483a.d
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index fd6c012..fd6c012 100755
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index d7fd430..d7fd430 100755
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new file mode 100755
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index d581fba..d581fba 100755
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index c7eb46d..c7eb46d 100755
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index 616e613..616e613 100755
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diff --git a/meap/ch7/target/debug/deps/libbincode-6b7b5bba40374a3a.rlib b/meap/ch7.bak/target/debug/deps/libbincode-6b7b5bba40374a3a.rlib
index 9af0ea8..9af0ea8 100755
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diff --git a/meap/ch7/target/debug/deps/libbyteorder-db47f374fba3e668.rlib b/meap/ch7.bak/target/debug/deps/libbyteorder-db47f374fba3e668.rlib
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diff --git a/meap/ch7/target/debug/deps/libitoa-91435f2d9a5c9d2d.rlib b/meap/ch7.bak/target/debug/deps/libitoa-91435f2d9a5c9d2d.rlib
index e4b75b2..e4b75b2 100755
--- a/meap/ch7/target/debug/deps/libitoa-91435f2d9a5c9d2d.rlib
+++ b/meap/ch7.bak/target/debug/deps/libitoa-91435f2d9a5c9d2d.rlib
diff --git a/meap/ch7/target/debug/deps/libproc_macro2-855c77c462de1b7d.rlib b/meap/ch7.bak/target/debug/deps/libproc_macro2-855c77c462de1b7d.rlib
index ef807f1..ef807f1 100755
--- a/meap/ch7/target/debug/deps/libproc_macro2-855c77c462de1b7d.rlib
+++ b/meap/ch7.bak/target/debug/deps/libproc_macro2-855c77c462de1b7d.rlib
diff --git a/meap/ch7/target/debug/deps/libquote-1cc9e04a7169e4c6.rlib b/meap/ch7.bak/target/debug/deps/libquote-1cc9e04a7169e4c6.rlib
index 0caa8b8..0caa8b8 100755
--- a/meap/ch7/target/debug/deps/libquote-1cc9e04a7169e4c6.rlib
+++ b/meap/ch7.bak/target/debug/deps/libquote-1cc9e04a7169e4c6.rlib
diff --git a/meap/ch7/target/debug/deps/libryu-b730c6c70ac3e2cc.rlib b/meap/ch7.bak/target/debug/deps/libryu-b730c6c70ac3e2cc.rlib
index 348ceee..348ceee 100755
--- a/meap/ch7/target/debug/deps/libryu-b730c6c70ac3e2cc.rlib
+++ b/meap/ch7.bak/target/debug/deps/libryu-b730c6c70ac3e2cc.rlib
diff --git a/meap/ch7/target/debug/deps/libserde-0aeb5a4b9a73de73.rlib b/meap/ch7.bak/target/debug/deps/libserde-0aeb5a4b9a73de73.rlib
index 3180afa..3180afa 100755
--- a/meap/ch7/target/debug/deps/libserde-0aeb5a4b9a73de73.rlib
+++ b/meap/ch7.bak/target/debug/deps/libserde-0aeb5a4b9a73de73.rlib
diff --git a/meap/ch7/target/debug/deps/libserde_derive-e5b7d25063e53202.so b/meap/ch7.bak/target/debug/deps/libserde_derive-e5b7d25063e53202.so
index 4f4dbe2..4f4dbe2 100755
--- a/meap/ch7/target/debug/deps/libserde_derive-e5b7d25063e53202.so
+++ b/meap/ch7.bak/target/debug/deps/libserde_derive-e5b7d25063e53202.so
diff --git a/meap/ch7/target/debug/deps/libserde_json-2d6c62b2bd77dda0.rlib b/meap/ch7.bak/target/debug/deps/libserde_json-2d6c62b2bd77dda0.rlib
index 37bc126..37bc126 100755
--- a/meap/ch7/target/debug/deps/libserde_json-2d6c62b2bd77dda0.rlib
+++ b/meap/ch7.bak/target/debug/deps/libserde_json-2d6c62b2bd77dda0.rlib
diff --git a/meap/ch7/target/debug/deps/libsyn-68015be05f89a0f5.rlib b/meap/ch7.bak/target/debug/deps/libsyn-68015be05f89a0f5.rlib
index 1650bba..1650bba 100755
--- a/meap/ch7/target/debug/deps/libsyn-68015be05f89a0f5.rlib
+++ b/meap/ch7.bak/target/debug/deps/libsyn-68015be05f89a0f5.rlib
diff --git a/meap/ch7/target/debug/deps/libunicode_xid-12657c7cced582bd.rlib b/meap/ch7.bak/target/debug/deps/libunicode_xid-12657c7cced582bd.rlib
index 737a83c..737a83c 100755
--- a/meap/ch7/target/debug/deps/libunicode_xid-12657c7cced582bd.rlib
+++ b/meap/ch7.bak/target/debug/deps/libunicode_xid-12657c7cced582bd.rlib
diff --git a/meap/ch7/target/debug/deps/proc_macro2-855c77c462de1b7d.d b/meap/ch7.bak/target/debug/deps/proc_macro2-855c77c462de1b7d.d
index 0cc4db6..0cc4db6 100755
--- a/meap/ch7/target/debug/deps/proc_macro2-855c77c462de1b7d.d
+++ b/meap/ch7.bak/target/debug/deps/proc_macro2-855c77c462de1b7d.d
diff --git a/meap/ch7/target/debug/deps/quote-1cc9e04a7169e4c6.d b/meap/ch7.bak/target/debug/deps/quote-1cc9e04a7169e4c6.d
index 4054a6c..4054a6c 100755
--- a/meap/ch7/target/debug/deps/quote-1cc9e04a7169e4c6.d
+++ b/meap/ch7.bak/target/debug/deps/quote-1cc9e04a7169e4c6.d
diff --git a/meap/ch7/target/debug/deps/ryu-b730c6c70ac3e2cc.d b/meap/ch7.bak/target/debug/deps/ryu-b730c6c70ac3e2cc.d
index b8070d9..b8070d9 100755
--- a/meap/ch7/target/debug/deps/ryu-b730c6c70ac3e2cc.d
+++ b/meap/ch7.bak/target/debug/deps/ryu-b730c6c70ac3e2cc.d
diff --git a/meap/ch7/target/debug/deps/serde-0aeb5a4b9a73de73.d b/meap/ch7.bak/target/debug/deps/serde-0aeb5a4b9a73de73.d
index fab6c77..fab6c77 100755
--- a/meap/ch7/target/debug/deps/serde-0aeb5a4b9a73de73.d
+++ b/meap/ch7.bak/target/debug/deps/serde-0aeb5a4b9a73de73.d
diff --git a/meap/ch7/target/debug/deps/serde_derive-e5b7d25063e53202.d b/meap/ch7.bak/target/debug/deps/serde_derive-e5b7d25063e53202.d
index e4b2431..e4b2431 100755
--- a/meap/ch7/target/debug/deps/serde_derive-e5b7d25063e53202.d
+++ b/meap/ch7.bak/target/debug/deps/serde_derive-e5b7d25063e53202.d
diff --git a/meap/ch7/target/debug/deps/serde_json-2d6c62b2bd77dda0.d b/meap/ch7.bak/target/debug/deps/serde_json-2d6c62b2bd77dda0.d
index 967ebf5..967ebf5 100755
--- a/meap/ch7/target/debug/deps/serde_json-2d6c62b2bd77dda0.d
+++ b/meap/ch7.bak/target/debug/deps/serde_json-2d6c62b2bd77dda0.d
diff --git a/meap/ch7/target/debug/deps/syn-68015be05f89a0f5.d b/meap/ch7.bak/target/debug/deps/syn-68015be05f89a0f5.d
index f38c244..f38c244 100755
--- a/meap/ch7/target/debug/deps/syn-68015be05f89a0f5.d
+++ b/meap/ch7.bak/target/debug/deps/syn-68015be05f89a0f5.d
diff --git a/meap/ch7/target/debug/deps/unicode_xid-12657c7cced582bd.d b/meap/ch7.bak/target/debug/deps/unicode_xid-12657c7cced582bd.d
index 26fe270..26fe270 100755
--- a/meap/ch7/target/debug/deps/unicode_xid-12657c7cced582bd.d
+++ b/meap/ch7.bak/target/debug/deps/unicode_xid-12657c7cced582bd.d
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/15dx0lml206w7kk3.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/15dx0lml206w7kk3.o
index 40918b3..40918b3 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/15dx0lml206w7kk3.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/15dx0lml206w7kk3.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1bfmd0rwos6vmijh.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1bfmd0rwos6vmijh.o
index 9be7ae2..9be7ae2 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1bfmd0rwos6vmijh.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1bfmd0rwos6vmijh.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1gflib1cfmlgegv3.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1gflib1cfmlgegv3.o
index 6e0f403..6e0f403 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1gflib1cfmlgegv3.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1gflib1cfmlgegv3.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j2feb1zskpoyzgv.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j2feb1zskpoyzgv.o
index 7f5a47e..7f5a47e 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j2feb1zskpoyzgv.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j2feb1zskpoyzgv.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j7af3rwpk6x1tpg.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j7af3rwpk6x1tpg.o
index 9f7c00d..9f7c00d 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j7af3rwpk6x1tpg.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1j7af3rwpk6x1tpg.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1wxfvrb2bjhpb0cn.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1wxfvrb2bjhpb0cn.o
index 395fff1..395fff1 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1wxfvrb2bjhpb0cn.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1wxfvrb2bjhpb0cn.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1xs3w1p2l5jlwqs6.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1xs3w1p2l5jlwqs6.o
index 4e9e2a6..4e9e2a6 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1xs3w1p2l5jlwqs6.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/1xs3w1p2l5jlwqs6.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/22duuhqtduklwiat.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/22duuhqtduklwiat.o
index 7b0dca7..7b0dca7 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/22duuhqtduklwiat.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/22duuhqtduklwiat.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2hntke3jojraxsf.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2hntke3jojraxsf.o
index 8ae8388..8ae8388 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2hntke3jojraxsf.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2hntke3jojraxsf.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2syyudyj8o93nbyr.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2syyudyj8o93nbyr.o
index 236b3f4..236b3f4 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2syyudyj8o93nbyr.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/2syyudyj8o93nbyr.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3el3oxq1g21uix6j.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3el3oxq1g21uix6j.o
index 8277a20..8277a20 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3el3oxq1g21uix6j.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3el3oxq1g21uix6j.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3lcehln991uwlnzz.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3lcehln991uwlnzz.o
index cb1e0aa..cb1e0aa 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3lcehln991uwlnzz.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3lcehln991uwlnzz.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3ri0zf9ylodvkogd.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3ri0zf9ylodvkogd.o
index 5a4d1f1..5a4d1f1 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3ri0zf9ylodvkogd.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/3ri0zf9ylodvkogd.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4e2em19je77ai1a8.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4e2em19je77ai1a8.o
index a812d09..a812d09 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4e2em19je77ai1a8.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4e2em19je77ai1a8.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4l44697qc4i4f8fi.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4l44697qc4i4f8fi.o
index f3e5ee8..f3e5ee8 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4l44697qc4i4f8fi.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4l44697qc4i4f8fi.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4xqvu68sx5636ph7.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4xqvu68sx5636ph7.o
index 8d630b9..8d630b9 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4xqvu68sx5636ph7.o
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/4xqvu68sx5636ph7.o
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/5adn9y6mnwn2nxgr.o b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/5adn9y6mnwn2nxgr.o
index 11710ec..11710ec 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/5adn9y6mnwn2nxgr.o
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diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/dep-graph.bin b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/dep-graph.bin
index 0dd12ac..0dd12ac 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/dep-graph.bin
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index 654d7ee..654d7ee 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/query-cache.bin
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/query-cache.bin
diff --git a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/work-products.bin b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/work-products.bin
index 71966d5..71966d5 100755
--- a/meap/ch7/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux-17ug3m0u48iyv/work-products.bin
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index e69de29..e69de29 100755
--- a/meap/ch7/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s.lock
+++ b/meap/ch7.bak/target/debug/incremental/ch7-2lwizug5qzzw6/s-fbkkoalfy6-1roypux.lock
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index 6097340..6097340 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/1ojqdlpozbe6600e.o
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index 1dd4f93..1dd4f93 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/2ahmeyrsdf8rxhew.o
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index 7ca268c..7ca268c 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/2nubi5z5iugqvxea.o
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index b382d44..b382d44 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/3h6dcoc91ujrwolj.o
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index 72a38ba..72a38ba 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/59ayyxgsuxyaf0xm.o
diff --git a/meap/ch7/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/5k7ecp1nptke1tn.o b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/5k7ecp1nptke1tn.o
index eab80e7..eab80e7 100755
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index fbc0309..fbc0309 100755
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index 010de92..010de92 100755
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index 1b1699a..1b1699a 100755
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+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s-1epuicm4g8yk6/work-products.bin
diff --git a/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s.lock b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s.lock
new file mode 100755
index 0000000..e69de29
--- /dev/null
+++ b/meap/ch7.bak/target/debug/incremental/ch7-3eobpgzo5v8r1/s-fbkcm2zfin-gkgr4s.lock
diff --git a/meap/ch7/Cargo.lock b/meap/ch7/Cargo.lock
index 652669e..ee3ce52 100755..100644
--- a/meap/ch7/Cargo.lock
+++ b/meap/ch7/Cargo.lock
@@ -1,111 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
-name = "autocfg"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "bincode"
-version = "1.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "byteorder"
-version = "1.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "ch7"
 version = "0.1.0"
-dependencies = [
- "bincode 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
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-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-]
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diff --git a/meap/ch7/Cargo.toml b/meap/ch7/Cargo.toml
index dc520fc..a2435a0 100755..100644
--- a/meap/ch7/Cargo.toml
+++ b/meap/ch7/Cargo.toml
@@ -1,12 +1,9 @@
 [package]
 name = "ch7"
 version = "0.1.0"
-authors = ["Adam Carpenter <53hornet@gmail.com>"]
+authors = ["Adam Carpenter <gitlab@53hor.net>"]
 edition = "2018"
 
-[dependencies]
-bincode = "~1.1.3"
-serde = "~1.0.90"
-serde_derive = "~1.0.90"
-serde_json = "~1.0.39"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[dependencies]
diff --git a/meap/ch7/src/main.rs b/meap/ch7/src/main.rs
index 1dbb471..933a55e 100755..100644
--- a/meap/ch7/src/main.rs
+++ b/meap/ch7/src/main.rs
@@ -1,100 +1,17 @@
-//#[macro_use]
-//extern crate serde_derive;
-//
-//extern crate serde;
-//extern crate serde_json;
-//extern crate bincode;
-//
-//#[derive(Serialize, Deserialize)]
-//struct City {
-//    name: String,
-//    population: usize,
-//    latitude: f64,
-//    longitude: f64,
-//}
-//
-//fn main() {
-//    let calabar = City {
-//        name: String::from("Calabar"),
-//        population: 470_000,
-//        latitude: 4.95,
-//        longitude: 8.33,
-//    };
-//
-//    let as_json = serde_json::to_string(&calabar).unwrap();
-//    let as_bincode = bincode::serialize(&calabar).unwrap();
-//
-//    println!("json: {}", &as_json);
-//    println!("bincode: {:?}", &as_bincode);
-//    println!("bincode utf8: {:?}", String::from_utf8_lossy(&as_bincode));
-//}
+#[macro_use]
+extern crate serde_derive;
+extern crate serde;
+extern crate serde_json;
+extern crate bincode;
 
-
-//use std::io::prelude::*;
-//
-//const BYTES_PER_LINE: usize = 16;
-//const INPUT: &'static [u8] = br#"
-//
-//fn main() {
-//    println!("hello world")
-//}"#;
-//
-//fn main() -> std::io::Result<()> {
-//    let mut buffer: Vec<u8> = vec!();
-//    INPUT.read_to_end(&mut buffer)?;
-//
-//    let mut position_in_input = 0;
-//    
-//    for line in buffer.chunks(BYTES_PER_LINE) {
-//        print!("[0x{:08x}] ", position_in_input);
-//
-//        for byte in line {
-//            print!("{:02x} ", byte);
-//        }
-//
-//        println!();
-//        position_in_input += BYTES_PER_LINE;
-//    }
-//
-//    Ok(())
-//}
-
-
-//use std::fs::File;
-//use std::io::prelude::*;
-//use std::env;
-//
-//const BYTES_PER_LINE: usize = 16;
-//
-//fn main() {
-//    let arg1 = env::args().nth(1);
-//    let fname = arg1.expect("usage: fview FILENAME");
-//
-//    let mut f = File::open(&fname).expect("unable to open file");
-//    let mut pos = 0;
-//    let mut buffer = [0; BYTES_PER_LINE];
-//
-//    while let Ok(_) = f.read_exact(&mut buffer) {
-//        print!("[0x{:08x}] ", pos);
-//        
-//        for byte in &buffer {
-//            match *byte {
-//                0x00 => print!(".  "),
-//                0xff => print!("## "),
-//                _ => print!("{:02x} ", byte),
-//            }
-//        }
-//
-//        println!("");
-//        pos += BYTES_PER_LINE;
-//    }
-//}
-
-
-use std::path::PathBuf;
+#[derive(Serialize, Deserialize)]
+struct City {
+    name: String,
+    population: usize,
+    latitude: f64,
+    longitude: f64,
+}
 
 fn main() {
-    let mut hello = PathBuf::from("/tmp/hello.txt");
-    hello.pop();
-    println!("{:?}", hello.display());
+    println!("Hi, world!");
 }
diff --git a/meap/ch7/target/.rustc_info.json b/meap/ch7/target/.rustc_info.json
index 2bb58e7..8c3bf9b 100755..100644
--- a/meap/ch7/target/.rustc_info.json
+++ b/meap/ch7/target/.rustc_info.json
@@ -1 +1 @@
-{"rustc_fingerprint":5361904215157244162,"outputs":{"15337506775154344876":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/usr\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""],"1164083562126845933":["rustc 1.34.0\nbinary: rustc\ncommit-hash: unknown\ncommit-date: unknown\nhost: x86_64-unknown-linux-gnu\nrelease: 1.34.0\nLLVM version: 8.0\n",""],"1617349019360157463":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/usr\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""]},"successes":{}}
\ No newline at end of file
+{"rustc_fingerprint":14111439516551175047,"outputs":{"2196823701345282402":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/carpenat/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""],"1164083562126845933":["rustc 1.36.0 (a53f9df32 2019-07-03)\nbinary: rustc\ncommit-hash: a53f9df32fbb0b5f4382caaad8f1a46f36ea887c\ncommit-date: 2019-07-03\nhost: x86_64-unknown-linux-gnu\nrelease: 1.36.0\nLLVM version: 8.0\n",""],"4476964694761187371":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/carpenat/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n",""]},"successes":{}}
\ No newline at end of file
diff --git a/meap/ch7/target/debug/.cargo-lock b/meap/ch7/target/debug/.cargo-lock
index e69de29..e69de29 100755..100644
--- a/meap/ch7/target/debug/.cargo-lock
+++ b/meap/ch7/target/debug/.cargo-lock
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d
new file mode 100644
index 0000000..50aa297
--- /dev/null
+++ b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d
@@ -0,0 +1 @@
+1ac2e85ba9a1aa5b
\ No newline at end of file
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d.json b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d.json
new file mode 100644
index 0000000..967dbbc
--- /dev/null
+++ b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/bin-ch7-659f4ecc4254811d.json
@@ -0,0 +1 @@
+{"rustc":5632553715040628694,"features":"[]","target":17645462988276744829,"profile":14996655781355331481,"path":1036222786711178230,"deps":[],"local":[{"CheckDepInfo":{"dep_info":".fingerprint/ch7-659f4ecc4254811d/dep-bin-ch7-659f4ecc4254811d"}}],"rustflags":[],"metadata":12511675182929830222}
\ No newline at end of file
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/dep-bin-ch7-659f4ecc4254811d b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/dep-bin-ch7-659f4ecc4254811d
new file mode 100644
index 0000000..e046c38
--- /dev/null
+++ b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/dep-bin-ch7-659f4ecc4254811d
diff --git a/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/invoked.timestamp b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/invoked.timestamp
new file mode 100644
index 0000000..e00328d
--- /dev/null
+++ b/meap/ch7/target/debug/.fingerprint/ch7-659f4ecc4254811d/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/meap/ch7/target/debug/ch7 b/meap/ch7/target/debug/ch7
index 1466191..86e2a23 100755
--- a/meap/ch7/target/debug/ch7
+++ b/meap/ch7/target/debug/ch7
diff --git a/meap/ch7/target/debug/ch7.d b/meap/ch7/target/debug/ch7.d
index 5b5e606..fc8e114 100755..100644
--- a/meap/ch7/target/debug/ch7.d
+++ b/meap/ch7/target/debug/ch7.d
@@ -1 +1 @@
-/home/carpenat/devel/learning-rust/meap/ch7/target/debug/ch7: /home/carpenat/devel/learning-rust/meap/ch7/src/main.rs
+/home/carpenat/learning-rust/meap/ch7/target/debug/ch7: /home/carpenat/learning-rust/meap/ch7/src/main.rs
diff --git a/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d b/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d
new file mode 100755
index 0000000..86e2a23
--- /dev/null
+++ b/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d
diff --git a/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d.d b/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d.d
new file mode 100644
index 0000000..abda566
--- /dev/null
+++ b/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d.d
@@ -0,0 +1,5 @@
+/home/carpenat/learning-rust/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d: src/main.rs
+
+/home/carpenat/learning-rust/meap/ch7/target/debug/deps/ch7-659f4ecc4254811d.d: src/main.rs
+
+src/main.rs:
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/1ciwq0awzz42zolh.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/1ciwq0awzz42zolh.o
new file mode 100644
index 0000000..5dcc43e
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+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/1ciwq0awzz42zolh.o
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/2l0ibl32dz68ejft.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/2l0ibl32dz68ejft.o
new file mode 100644
index 0000000..08b9f5e
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+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/2l0ibl32dz68ejft.o
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/2v1iiz7q69f38ylq.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/2v1iiz7q69f38ylq.o
new file mode 100644
index 0000000..3027123
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/3yjmqli00cjmy86w.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/3yjmqli00cjmy86w.o
new file mode 100644
index 0000000..d1565bd
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/dep-graph.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/dep-graph.bin
new file mode 100644
index 0000000..23622df
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new file mode 100644
index 0000000..bc9b711
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/query-cache.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/query-cache.bin
new file mode 100644
index 0000000..a04b2bb
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+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/query-cache.bin
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/u9ska1ijohtyqbd.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/u9ska1ijohtyqbd.o
new file mode 100644
index 0000000..85f89cd
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/work-products.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr-19am80zhs80ag/work-products.bin
new file mode 100644
index 0000000..ba6833c
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr.lock b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiqthg2f-1akgyjr.lock
new file mode 100755
index 0000000..e69de29
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/1ciwq0awzz42zolh.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/1ciwq0awzz42zolh.o
new file mode 100644
index 0000000..5dcc43e
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/2l0ibl32dz68ejft.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/2l0ibl32dz68ejft.o
new file mode 100644
index 0000000..08b9f5e
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/2v1iiz7q69f38ylq.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/2v1iiz7q69f38ylq.o
new file mode 100644
index 0000000..3027123
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/3yjmqli00cjmy86w.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/3yjmqli00cjmy86w.o
new file mode 100644
index 0000000..d1565bd
--- /dev/null
+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/3yjmqli00cjmy86w.o
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/dep-graph.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/dep-graph.bin
new file mode 100644
index 0000000..23622df
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+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/dep-graph.bin
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/fqf42h9io303ej3.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/fqf42h9io303ej3.o
new file mode 100644
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/query-cache.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/query-cache.bin
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/u9ska1ijohtyqbd.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/u9ska1ijohtyqbd.o
new file mode 100644
index 0000000..85f89cd
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+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/u9ska1ijohtyqbd.o
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/work-products.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4-working/work-products.bin
new file mode 100644
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4.lock b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxiv6ryr0-ihwnf4.lock
new file mode 100755
index 0000000..e69de29
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/1ciwq0awzz42zolh.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/1ciwq0awzz42zolh.o
new file mode 100644
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/2l0ibl32dz68ejft.o b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/2l0ibl32dz68ejft.o
new file mode 100644
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diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/work-products.bin b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/work-products.bin
new file mode 100644
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--- /dev/null
+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz-working/work-products.bin
diff --git a/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz.lock b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz.lock
new file mode 100755
index 0000000..e69de29
--- /dev/null
+++ b/meap/ch7/target/debug/incremental/ch7-1lwa5sx77rkmi/s-fdxivcoxgt-vs7vuz.lock