[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#f7b43542838f0a4a6cfdb17fbeadf45002042a77 for pr-138499
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkfrysiak%2Ftower-of-hanoi-solver" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kfrysiak/tower-of-hanoi-solver on toolchain f7b43542838f0a4a6cfdb17fbeadf45002042a77
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f7b43542838f0a4a6cfdb17fbeadf45002042a77" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-2-tc1/source/Cargo.toml
[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" "+f7b43542838f0a4a6cfdb17fbeadf45002042a77" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f7b43542838f0a4a6cfdb17fbeadf45002042a77" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2752e40330433c57551f17c834a55c0ad8f1a675aeff5966e49844faf664f7f0
[INFO] running `Command { std: "docker" "start" "-a" "2752e40330433c57551f17c834a55c0ad8f1a675aeff5966e49844faf664f7f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2752e40330433c57551f17c834a55c0ad8f1a675aeff5966e49844faf664f7f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2752e40330433c57551f17c834a55c0ad8f1a675aeff5966e49844faf664f7f0", kill_on_drop: false }`
[INFO] [stdout] 2752e40330433c57551f17c834a55c0ad8f1a675aeff5966e49844faf664f7f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+f7b43542838f0a4a6cfdb17fbeadf45002042a77" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8d6c0d393482402083bd1f187b6aca0385f7c7ecaa2fa6e42efb772dbc85c5a
[INFO] running `Command { std: "docker" "start" "-a" "b8d6c0d393482402083bd1f187b6aca0385f7c7ecaa2fa6e42efb772dbc85c5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[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: elided lifetime has a name
[INFO] [stdout]   --> src/screen.rs:91:71
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl<'a> Screen<'a> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |                                                                       ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/screen.rs:91:71
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl<'a> Screen<'a> {
[INFO] [stdout]    |      -- lifetime `'a` declared here
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn index_mut(&'a mut self, row: usize, col: usize) -> &'a mut &str {
[INFO] [stdout]    |                                                                       ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[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: 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "b8d6c0d393482402083bd1f187b6aca0385f7c7ecaa2fa6e42efb772dbc85c5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8d6c0d393482402083bd1f187b6aca0385f7c7ecaa2fa6e42efb772dbc85c5a", kill_on_drop: false }`
[INFO] [stdout] b8d6c0d393482402083bd1f187b6aca0385f7c7ecaa2fa6e42efb772dbc85c5a