[INFO] cloning repository https://github.com/TAFH-debug/color-term
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TAFH-debug/color-term" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAFH-debug%2Fcolor-term", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAFH-debug%2Fcolor-term'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5276e895084de0165c52b0ae2f59458bbaf573ec
[INFO] checking TAFH-debug/color-term against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTAFH-debug%2Fcolor-term" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TAFH-debug/color-term
[INFO] finished tweaking git repo https://github.com/TAFH-debug/color-term
[INFO] tweaked toml for git repo https://github.com/TAFH-debug/color-term written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TAFH-debug/color-term on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TAFH-debug/color-term 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded plotters-bitmap v0.3.1
[INFO] [stderr]   Downloaded float-ord v0.2.0
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.1
[INFO] [stderr]   Downloaded weezl v0.1.6
[INFO] [stderr]   Downloaded font-kit v0.10.1
[INFO] [stderr]   Downloaded ttf-parser v0.12.3
[INFO] [stderr]   Downloaded syn v1.0.95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 645ac89cd15a9b807653ba6c47631bb86c928ca01fe168ac2a940a5568e22ed0
[INFO] running `Command { std: "docker" "start" "-a" "645ac89cd15a9b807653ba6c47631bb86c928ca01fe168ac2a940a5568e22ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "645ac89cd15a9b807653ba6c47631bb86c928ca01fe168ac2a940a5568e22ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "645ac89cd15a9b807653ba6c47631bb86c928ca01fe168ac2a940a5568e22ed0", kill_on_drop: false }`
[INFO] [stdout] 645ac89cd15a9b807653ba6c47631bb86c928ca01fe168ac2a940a5568e22ed0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1ed5574136e88e157963b8e02fb2d27ebdd3e48014b40dc16c4c5db7381fbcd
[INFO] running `Command { std: "docker" "start" "-a" "b1ed5574136e88e157963b8e02fb2d27ebdd3e48014b40dc16c4c5db7381fbcd", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking weezl v0.1.6
[INFO] [stderr]     Checking bytemuck v1.9.1
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]     Checking ttf-parser v0.12.3
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking gif v0.11.3
[INFO] [stderr]    Compiling servo-fontconfig-sys v5.1.0
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling pathfinder_simd v0.5.1
[INFO] [stderr]     Checking freetype v0.7.0
[INFO] [stderr]     Checking servo-fontconfig v0.5.1
[INFO] [stderr]     Checking pathfinder_geometry v0.5.1
[INFO] [stderr]     Checking font-kit v0.10.1
[INFO] [stderr]     Checking plotters-bitmap v0.3.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking color-term v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/png/png_decoder.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let p = (a + b - c);
[INFO] [stdout]     |             ^         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 165 -     let p = (a + b - c);
[INFO] [stdout] 165 +     let p = a + b - c ;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chuncks::*`
[INFO] [stdout]  --> src/png.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use chuncks::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/png/png_decoder.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let p = (a + b - c);
[INFO] [stdout]     |             ^         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 165 -     let p = (a + b - c);
[INFO] [stdout] 165 +     let p = a + b - c ;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chuncks::*`
[INFO] [stdout]  --> src/png.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use chuncks::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/animations.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut len = 10;
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/animations.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut file = BufReader::new(File::open(filename).unwrap());
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/png/png_decoder.rs:44:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (image, width, height) = match raw_decode(filename) {
[INFO] [stdout]    |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/png/png_decoder.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |         let mut idata = inflate_bytes(idat_data.as_slice()).unwrap();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `font_background` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn font_background<S: AsRef<str>>(fontc: Color, back: Color, text: S) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `append` are never used
[INFO] [stdout]   --> src/structs.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl StringBuilder {
[INFO] [stdout]    | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn add<S: AsRef<str>>(&mut self, string: S) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn append(&mut self, c: char) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loading_line` is never used
[INFO] [stdout]   --> src/animations.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn loading_line(count: i32, len: i32) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `animate_loading` is never used
[INFO] [stdout]   --> src/animations.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn animate_loading() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `paint_sym` is never used
[INFO] [stdout]   --> src/console.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn paint_sym<S: AsRef<str>>(src: S, color: Color, sym: char) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]   --> src/png/png_decoder.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Wrapper {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/animations.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             stdout().flush();
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let _ = stdout().flush();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/png/chuncks.rs:24:37
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let slice = bytes.as_slice().clone();
[INFO] [stdout]    |                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/png/png_decoder.rs:192:5
[INFO] [stdout]     |
[INFO] [stdout] 192 |     f.read(&mut [0; 4]);
[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] 192 |     let _ = f.read(&mut [0; 4]);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/animations.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut len = 10;
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/animations.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut file = BufReader::new(File::open(filename).unwrap());
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]   --> src/png/png_decoder.rs:44:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (image, width, height) = match raw_decode(filename) {
[INFO] [stdout]    |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/png/png_decoder.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |         let mut idata = inflate_bytes(idat_data.as_slice()).unwrap();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `font_background` is never used
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn font_background<S: AsRef<str>>(fontc: Color, back: Color, text: S) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `append` are never used
[INFO] [stdout]   --> src/structs.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl StringBuilder {
[INFO] [stdout]    | ------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn add<S: AsRef<str>>(&mut self, string: S) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn append(&mut self, c: char) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loading_line` is never used
[INFO] [stdout]   --> src/animations.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn loading_line(count: i32, len: i32) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `animate_loading` is never used
[INFO] [stdout]   --> src/animations.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn animate_loading() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `paint_sym` is never used
[INFO] [stdout]   --> src/console.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn paint_sym<S: AsRef<str>>(src: S, color: Color, sym: char) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]   --> src/png/png_decoder.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Wrapper {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/animations.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             stdout().flush();
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let _ = stdout().flush();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/png/chuncks.rs:24:37
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let slice = bytes.as_slice().clone();
[INFO] [stdout]    |                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/png/png_decoder.rs:192:5
[INFO] [stdout]     |
[INFO] [stdout] 192 |     f.read(&mut [0; 4]);
[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] 192 |     let _ = f.read(&mut [0; 4]);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.47s
[INFO] running `Command { std: "docker" "inspect" "b1ed5574136e88e157963b8e02fb2d27ebdd3e48014b40dc16c4c5db7381fbcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1ed5574136e88e157963b8e02fb2d27ebdd3e48014b40dc16c4c5db7381fbcd", kill_on_drop: false }`
[INFO] [stdout] b1ed5574136e88e157963b8e02fb2d27ebdd3e48014b40dc16c4c5db7381fbcd
