[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#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[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 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded colored v2.0.0
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c712ed5e4a20b05b0da0911383564388b08cf83a56b89c0d39bc4dc5370283b1
[INFO] running `Command { std: "docker" "start" "-a" "c712ed5e4a20b05b0da0911383564388b08cf83a56b89c0d39bc4dc5370283b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c712ed5e4a20b05b0da0911383564388b08cf83a56b89c0d39bc4dc5370283b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c712ed5e4a20b05b0da0911383564388b08cf83a56b89c0d39bc4dc5370283b1", kill_on_drop: false }`
[INFO] [stdout] c712ed5e4a20b05b0da0911383564388b08cf83a56b89c0d39bc4dc5370283b1
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0c10b223d48cfa88326a7a3c4e381ba0cc5012d12d6dd304ebf9e9434689d24
[INFO] running `Command { std: "docker" "start" "-a" "f0c10b223d48cfa88326a7a3c4e381ba0cc5012d12d6dd304ebf9e9434689d24", 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/screen.rs:91:23
[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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/screen.rs:91:23
[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 0.92s
[INFO] running `Command { std: "docker" "inspect" "f0c10b223d48cfa88326a7a3c4e381ba0cc5012d12d6dd304ebf9e9434689d24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0c10b223d48cfa88326a7a3c4e381ba0cc5012d12d6dd304ebf9e9434689d24", kill_on_drop: false }`
[INFO] [stdout] f0c10b223d48cfa88326a7a3c4e381ba0cc5012d12d6dd304ebf9e9434689d24