[INFO] cloning repository https://github.com/klyye/hangman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/klyye/hangman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fklyye%2Fhangman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fklyye%2Fhangman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ede3a8c3f848d0fd1ee829b635b2edb48f5a3cf
[INFO] testing klyye/hangman against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fklyye%2Fhangman" "/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/klyye/hangman
[INFO] finished tweaking git repo https://github.com/klyye/hangman
[INFO] tweaked toml for git repo https://github.com/klyye/hangman written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/klyye/hangman on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/klyye/hangman 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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getrandom v0.2.8
[INFO] [stderr]   Downloaded libc v0.2.140
[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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 691f9f4126e076637554f2f786c67dc0bf8b8f5e2d65338e56a60cb2e556f21e
[INFO] running `Command { std: "docker" "start" "-a" "691f9f4126e076637554f2f786c67dc0bf8b8f5e2d65338e56a60cb2e556f21e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "691f9f4126e076637554f2f786c67dc0bf8b8f5e2d65338e56a60cb2e556f21e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "691f9f4126e076637554f2f786c67dc0bf8b8f5e2d65338e56a60cb2e556f21e", kill_on_drop: false }`
[INFO] [stdout] 691f9f4126e076637554f2f786c67dc0bf8b8f5e2d65338e56a60cb2e556f21e
[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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 846450ff3a1f0a146d7d5bfd1a6550e4cd7e46863893eed5b59bca3c5b4ca496
[INFO] running `Command { std: "docker" "start" "-a" "846450ff3a1f0a146d7d5bfd1a6550e4cd7e46863893eed5b59bca3c5b4ca496", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hangman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `len_min`
[INFO] [stdout]   --> src/chooser.rs:64:16
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_max`
[INFO] [stdout]   --> src/chooser.rs:64:30
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]   --> src/chooser.rs:64:44
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `letter`
[INFO] [stdout]   --> src/chooser.rs:70:25
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn guess(&mut self, letter: char) {
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_letter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_evil`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn game_loop(is_evil: bool, words_file: &str) {
[INFO] [stdout]   |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_evil`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_min`
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let len_min = 5;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_max`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let len_max = 18; // "telecommunications"
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.26s
[INFO] running `Command { std: "docker" "inspect" "846450ff3a1f0a146d7d5bfd1a6550e4cd7e46863893eed5b59bca3c5b4ca496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "846450ff3a1f0a146d7d5bfd1a6550e4cd7e46863893eed5b59bca3c5b4ca496", kill_on_drop: false }`
[INFO] [stdout] 846450ff3a1f0a146d7d5bfd1a6550e4cd7e46863893eed5b59bca3c5b4ca496
[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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc25bcbd5b77e6a84053646c32a8d3e0c840bde1f5b745bad3bb20a34c030a26
[INFO] running `Command { std: "docker" "start" "-a" "fc25bcbd5b77e6a84053646c32a8d3e0c840bde1f5b745bad3bb20a34c030a26", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `len_min`
[INFO] [stdout]   --> src/chooser.rs:64:16
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_max`
[INFO] [stdout]   --> src/chooser.rs:64:30
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]   --> src/chooser.rs:64:44
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `letter`
[INFO] [stdout]   --> src/chooser.rs:70:25
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn guess(&mut self, letter: char) {
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_letter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling hangman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `is_evil`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn game_loop(is_evil: bool, words_file: &str) {
[INFO] [stdout]   |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_evil`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_min`
[INFO] [stdout]   --> src/main.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let len_min = 5;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_max`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let len_max = 18; // "telecommunications"
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_min`
[INFO] [stdout]   --> src/chooser.rs:64:16
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len_max`
[INFO] [stdout]   --> src/chooser.rs:64:30
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]   --> src/chooser.rs:64:44
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stdout]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `letter`
[INFO] [stdout]   --> src/chooser.rs:70:25
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn guess(&mut self, letter: char) {
[INFO] [stdout]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_letter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "fc25bcbd5b77e6a84053646c32a8d3e0c840bde1f5b745bad3bb20a34c030a26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc25bcbd5b77e6a84053646c32a8d3e0c840bde1f5b745bad3bb20a34c030a26", kill_on_drop: false }`
[INFO] [stdout] fc25bcbd5b77e6a84053646c32a8d3e0c840bde1f5b745bad3bb20a34c030a26
[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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b1a5ed4b1376aa709e57e0fd1649290cbfa7566eed8546c766a6b38e92dee97f
[INFO] running `Command { std: "docker" "start" "-a" "b1a5ed4b1376aa709e57e0fd1649290cbfa7566eed8546c766a6b38e92dee97f", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `len_min`
[INFO] [stderr]   --> src/chooser.rs:64:16
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stderr]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len_max`
[INFO] [stderr]   --> src/chooser.rs:64:30
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stderr]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_path`
[INFO] [stderr]   --> src/chooser.rs:64:44
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn new(len_min: u32, len_max: u32, file_path: &str) -> Self {
[INFO] [stderr]    |                                            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `letter`
[INFO] [stderr]   --> src/chooser.rs:70:25
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn guess(&mut self, letter: char) {
[INFO] [stderr]    |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_letter`
[INFO] [stderr] 
[INFO] [stderr] warning: `hangman` (lib) generated 4 warnings (run `cargo fix --lib -p hangman` to apply 4 suggestions)
[INFO] [stderr] warning: unused variable: `is_evil`
[INFO] [stderr]  --> src/main.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn game_loop(is_evil: bool, words_file: &str) {
[INFO] [stderr]   |              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_evil`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/main.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len_min`
[INFO] [stderr]   --> src/main.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let len_min = 5;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_min`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len_max`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let len_max = 18; // "telecommunications"
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_len_max`
[INFO] [stderr] 
[INFO] [stderr] warning: `hangman` (bin "hangman" test) generated 4 warnings (run `cargo fix --bin "hangman" -p hangman --tests` to apply 4 suggestions)
[INFO] [stderr] warning: `hangman` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/hangman-a2e8c40859bdee72)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hangman-cf0b9f94eb0bcbdd)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hangman
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b1a5ed4b1376aa709e57e0fd1649290cbfa7566eed8546c766a6b38e92dee97f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1a5ed4b1376aa709e57e0fd1649290cbfa7566eed8546c766a6b38e92dee97f", kill_on_drop: false }`
[INFO] [stdout] b1a5ed4b1376aa709e57e0fd1649290cbfa7566eed8546c766a6b38e92dee97f