[INFO] cloning repository https://github.com/sarvex/smalltalk-maelstrom
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sarvex/smalltalk-maelstrom" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarvex%2Fsmalltalk-maelstrom", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarvex%2Fsmalltalk-maelstrom'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a676926a104ee2bcdd0a94ba60a7e51b8d2f8cd
[INFO] checking sarvex/smalltalk-maelstrom against master#fc5af1813307d25a84d633f21e2e53c9376eb547 for pr-144386
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsarvex%2Fsmalltalk-maelstrom" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sarvex/smalltalk-maelstrom
[INFO] finished tweaking git repo https://github.com/sarvex/smalltalk-maelstrom
[INFO] tweaked toml for git repo https://github.com/sarvex/smalltalk-maelstrom written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sarvex/smalltalk-maelstrom on toolchain fc5af1813307d25a84d633f21e2e53c9376eb547
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sarvex/smalltalk-maelstrom 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" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cb8568f1a4ac35b978fa1fb26101252ba5fdf29a9ffbe3539bfcb155a4f3c2d
[INFO] running `Command { std: "docker" "start" "-a" "1cb8568f1a4ac35b978fa1fb26101252ba5fdf29a9ffbe3539bfcb155a4f3c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cb8568f1a4ac35b978fa1fb26101252ba5fdf29a9ffbe3539bfcb155a4f3c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cb8568f1a4ac35b978fa1fb26101252ba5fdf29a9ffbe3539bfcb155a4f3c2d", kill_on_drop: false }`
[INFO] [stdout] 1cb8568f1a4ac35b978fa1fb26101252ba5fdf29a9ffbe3539bfcb155a4f3c2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 076c593a333a46c718c4c932fa85f85039ce98e7128647c3120ae0a76660766f
[INFO] running `Command { std: "docker" "start" "-a" "076c593a333a46c718c4c932fa85f85039ce98e7128647c3120ae0a76660766f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.88
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.82
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking maelstrom v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `send_all` is never used
[INFO] [stdout]   --> src/sender.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Sender {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn send_all(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send_all` is never used
[INFO] [stdout]   --> src/sender.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Sender {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn send_all(&mut self) {
[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 7.26s
[INFO] running `Command { std: "docker" "inspect" "076c593a333a46c718c4c932fa85f85039ce98e7128647c3120ae0a76660766f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "076c593a333a46c718c4c932fa85f85039ce98e7128647c3120ae0a76660766f", kill_on_drop: false }`
[INFO] [stdout] 076c593a333a46c718c4c932fa85f85039ce98e7128647c3120ae0a76660766f