[INFO] cloning repository https://github.com/kfrysiak/tower-of-hanoi-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kfrysiak/tower-of-hanoi-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkfrysiak%2Ftower-of-hanoi-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkfrysiak%2Ftower-of-hanoi-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56057d93e379d51745b475ce054764504aa84dce
[INFO] checking kfrysiak/tower-of-hanoi-solver against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkfrysiak%2Ftower-of-hanoi-solver" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kfrysiak/tower-of-hanoi-solver
[INFO] finished tweaking git repo https://github.com/kfrysiak/tower-of-hanoi-solver
[INFO] tweaked toml for git repo https://github.com/kfrysiak/tower-of-hanoi-solver written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kfrysiak/tower-of-hanoi-solver on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kfrysiak/tower-of-hanoi-solver 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50a1c69d3fa0721f5f7747361acbf5646af5147cce06e47dd5fa028b3e893639
[INFO] running `Command { std: "docker" "start" "-a" "50a1c69d3fa0721f5f7747361acbf5646af5147cce06e47dd5fa028b3e893639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50a1c69d3fa0721f5f7747361acbf5646af5147cce06e47dd5fa028b3e893639", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50a1c69d3fa0721f5f7747361acbf5646af5147cce06e47dd5fa028b3e893639", kill_on_drop: false }`
[INFO] [stdout] 50a1c69d3fa0721f5f7747361acbf5646af5147cce06e47dd5fa028b3e893639
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7314efc1f7736384ed3f482f813ad65ff65f4758769c70eccb174a5f2fee543
[INFO] running `Command { std: "docker" "start" "-a" "d7314efc1f7736384ed3f482f813ad65ff65f4758769c70eccb174a5f2fee543", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking stacks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `index` and `index_mut` are never used
[INFO] [stdout]   --> src/screen.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl<'a> Screen<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn index(&self, row: usize, col: usize) -> &&str {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/screen.rs:91:71
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |                       --                                       --     ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                       |                                        |
[INFO] [stdout]    |                       the lifetime is named here               the same lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &'a str {
[INFO] [stdout]    |                                                                        ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `index` and `index_mut` are never used
[INFO] [stdout]   --> src/screen.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl<'a> Screen<'a> {
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 86 |     pub fn index(&self, row: usize, col: usize) -> &&str {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/screen.rs:91:71
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |                       --                                       --     ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                       |                                        |
[INFO] [stdout]    |                       the lifetime is named here               the same lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &'a str {
[INFO] [stdout]    |                                                                        ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `Command { std: "docker" "inspect" "d7314efc1f7736384ed3f482f813ad65ff65f4758769c70eccb174a5f2fee543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7314efc1f7736384ed3f482f813ad65ff65f4758769c70eccb174a5f2fee543", kill_on_drop: false }`
[INFO] [stdout] d7314efc1f7736384ed3f482f813ad65ff65f4758769c70eccb174a5f2fee543