[INFO] fetching crate gw-rust-programming-tutorial 0.1.0...
[INFO] checking gw-rust-programming-tutorial-0.1.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate gw-rust-programming-tutorial 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate gw-rust-programming-tutorial 0.1.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gw-rust-programming-tutorial 0.1.0
[INFO] finished tweaking crates.io crate gw-rust-programming-tutorial 0.1.0
[INFO] tweaked toml for crates.io crate gw-rust-programming-tutorial 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate gw-rust-programming-tutorial 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stdext v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38dffa7bed86b808e3b71733ea78ee3991574d53181c49a59691629c2b9949fe
[INFO] running `Command { std: "docker" "start" "-a" "38dffa7bed86b808e3b71733ea78ee3991574d53181c49a59691629c2b9949fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38dffa7bed86b808e3b71733ea78ee3991574d53181c49a59691629c2b9949fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38dffa7bed86b808e3b71733ea78ee3991574d53181c49a59691629c2b9949fe", kill_on_drop: false }`
[INFO] [stdout] 38dffa7bed86b808e3b71733ea78ee3991574d53181c49a59691629c2b9949fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8ff705659d8352bd8adf93b5ff93a3d761bc7767906dabdb8f44ce2e33b1b9f
[INFO] running `Command { std: "docker" "start" "-a" "e8ff705659d8352bd8adf93b5ff93a3d761bc7767906dabdb8f44ce2e33b1b9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking stdext v0.3.1
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]     Checking gw-rust-programming-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/chapter_8/test_collection.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/chapter_8/test_collection.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let v = vec![1, 2, 3];
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/chapter_8/test_string.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut s = String::new();
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/chapter_8/test_string.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = data.to_string();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let s = "initial contents".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/chapter_8/test_collection.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let hello = String::from("السلام عليكم");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/chapter_8/test_collection.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let v = vec![1, 2, 3];
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let hello = String::from("Dobrý den");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = String::from("שָׁלוֹם");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let hello = String::from("नमस्ते");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hello = String::from("こんにちは");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let hello = String::from("Olá");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let hello = String::from("Здравствуйте");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let hello = String::from("Hola");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/chapter_8/test_string.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut s = String::new();
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let s3 = s1 + &s2; // 注意 s1 被移动了，不能继续使用
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/chapter_8/test_string.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut s = String::new();
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/chapter_8/test_string.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s = data.to_string();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let s = "initial contents".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let hello = String::from("السلام عليكم");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let hello = String::from("Dobrý den");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = String::from("שָׁלוֹם");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let hello = String::from("नमस्ते");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hello = String::from("こんにちは");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let hello = String::from("Olá");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let hello = String::from("Здравствуйте");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let hello = String::from("Hola");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/chapter_8/test_string.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut s = String::new();
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/chapter_8/test_string.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let s3 = s1 + &s2; // 注意 s1 被移动了，不能继续使用
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/chapter_9/test_panic.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let f = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/chapter_9/test_panic.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let f = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it1`
[INFO] [stdout]   --> src/chapter_13/file_iterator.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let it1 = v1.iter_mut();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_it1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it1`
[INFO] [stdout]   --> src/chapter_13/file_iterator.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let it1 = v1.into_iter();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_it1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Int(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:37:15
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Float(f64),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Float(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Text(String),
[INFO] [stdout]    |         ---- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Text(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 57 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 66 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it1`
[INFO] [stdout]   --> src/chapter_13/file_iterator.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let it1 = v1.iter_mut();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_it1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it1`
[INFO] [stdout]   --> src/chapter_13/file_iterator.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let it1 = v1.into_iter();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_it1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Int(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:37:15
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Float(f64),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 |         Float(()),
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter_8/test_collection.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Text(String),
[INFO] [stdout]    |         ---- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Text(()),
[INFO] [stdout]    |              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 57 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/chapter_10/test_traits.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 66 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     test_panic::read_username_from_file();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let _ = test_panic::read_username_from_file();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     test_panic::read_username_from_file();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let _ = test_panic::read_username_from_file();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mapCus` should have a snake case name
[INFO] [stdout]   --> src/chapter_8/test_map.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut mapCus:HashMap<i32,i32>=HashMap::new();
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `map_cus`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/chapter_12/test_12_6.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     parse_env();
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let _ = parse_env();
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mapCus` should have a snake case name
[INFO] [stdout]   --> src/chapter_8/test_map.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut mapCus:HashMap<i32,i32>=HashMap::new();
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `map_cus`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/chapter_12/test_12_6.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     parse_env();
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let _ = parse_env();
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fnum`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let fnum: f32 = 3.0;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_fnum`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fnum`
[INFO] [stdout]   --> src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let fnum: f32 = 3.0;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_fnum`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ch: char = 'a';
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = tu1;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ch`
[INFO] [stdout]   --> src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let ch: char = 'a';
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = tu1;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> src/main.rs:217:9
[INFO] [stdout]     |
[INFO] [stdout] 217 |     let s1 = gives_ownership(); // gives_ownership 将返回值
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]    --> src/main.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 |     let s3 = takes_and_gives_back(s2); // s2 被移动到
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> src/main.rs:217:9
[INFO] [stdout]     |
[INFO] [stdout] 217 |     let s1 = gives_ownership(); // gives_ownership 将返回值
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]    --> src/main.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 |     let s3 = takes_and_gives_back(s2); // s2 被移动到
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `username`, `email`, and `sign_in_count` are never read
[INFO] [stdout]    --> src/main.rs:279:5
[INFO] [stdout]     |
[INFO] [stdout] 277 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 278 |     active: bool,
[INFO] [stdout] 279 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 280 |     email: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 281 |     sign_in_count: u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:322:14
[INFO] [stdout]     |
[INFO] [stdout] 322 | struct Color(i32, i32, i32);
[INFO] [stdout]     |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 324 | struct Point(i32, i32, i32);
[INFO] [stdout]     |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:366:9
[INFO] [stdout]     |
[INFO] [stdout] 366 |     Ooo(Option<i8>),
[INFO] [stdout]     |     --- ^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 366 |     Ooo(()),
[INFO] [stdout]     |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, `Write`, and `ChangeColor` are never constructed
[INFO] [stdout]    --> src/main.rs:362:5
[INFO] [stdout]     |
[INFO] [stdout] 361 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 362 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 363 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 364 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 365 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel`, `Dime`, and `Quarter` are never constructed
[INFO] [stdout]    --> src/main.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 381 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 382 |     Penny,
[INFO] [stdout] 383 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 384 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 385 |     Quarter,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_optionT_match` should have a snake case name
[INFO] [stdout]    --> src/main.rs:407:4
[INFO] [stdout]     |
[INFO] [stdout] 407 | fn test_optionT_match() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_option_t_match`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `username`, `email`, and `sign_in_count` are never read
[INFO] [stdout]    --> src/main.rs:279:5
[INFO] [stdout]     |
[INFO] [stdout] 277 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 278 |     active: bool,
[INFO] [stdout] 279 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 280 |     email: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 281 |     sign_in_count: u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:322:14
[INFO] [stdout]     |
[INFO] [stdout] 322 | struct Color(i32, i32, i32);
[INFO] [stdout]     |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/main.rs:324:14
[INFO] [stdout]     |
[INFO] [stdout] 324 | struct Point(i32, i32, i32);
[INFO] [stdout]     |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:366:9
[INFO] [stdout]     |
[INFO] [stdout] 366 |     Ooo(Option<i8>),
[INFO] [stdout]     |     --- ^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 366 |     Ooo(()),
[INFO] [stdout]     |         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, `Write`, and `ChangeColor` are never constructed
[INFO] [stdout]    --> src/main.rs:362:5
[INFO] [stdout]     |
[INFO] [stdout] 361 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 362 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 363 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 364 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 365 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel`, `Dime`, and `Quarter` are never constructed
[INFO] [stdout]    --> src/main.rs:383:5
[INFO] [stdout]     |
[INFO] [stdout] 381 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 382 |     Penny,
[INFO] [stdout] 383 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 384 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 385 |     Quarter,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_optionT_match` should have a snake case name
[INFO] [stdout]    --> src/main.rs:407:4
[INFO] [stdout]     |
[INFO] [stdout] 407 | fn test_optionT_match() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_option_t_match`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.01s
[INFO] running `Command { std: "docker" "inspect" "e8ff705659d8352bd8adf93b5ff93a3d761bc7767906dabdb8f44ce2e33b1b9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8ff705659d8352bd8adf93b5ff93a3d761bc7767906dabdb8f44ce2e33b1b9f", kill_on_drop: false }`
[INFO] [stdout] e8ff705659d8352bd8adf93b5ff93a3d761bc7767906dabdb8f44ce2e33b1b9f