[INFO] fetching crate maelstrom-worker-child 0.13.0...
[INFO] checking maelstrom-worker-child-0.13.0 against master#249cb84316401daf040832cdbb8a45e0f5ab6af8 for pr-138438
[INFO] extracting crate maelstrom-worker-child 0.13.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate maelstrom-worker-child 0.13.0 on toolchain 249cb84316401daf040832cdbb8a45e0f5ab6af8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maelstrom-worker-child 0.13.0
[INFO] finished tweaking crates.io crate maelstrom-worker-child 0.13.0
[INFO] tweaked toml for crates.io crate maelstrom-worker-child 0.13.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate maelstrom-worker-child 0.13.0 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" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c999b9367375cb4a9bfcc1d1fb44f4c91b484e11b3c41594aaeb644a4e183dd
[INFO] running `Command { std: "docker" "start" "-a" "0c999b9367375cb4a9bfcc1d1fb44f4c91b484e11b3c41594aaeb644a4e183dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c999b9367375cb4a9bfcc1d1fb44f4c91b484e11b3c41594aaeb644a4e183dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c999b9367375cb4a9bfcc1d1fb44f4c91b484e11b3c41594aaeb644a4e183dd", kill_on_drop: false }`
[INFO] [stdout] 0c999b9367375cb4a9bfcc1d1fb44f4c91b484e11b3c41594aaeb644a4e183dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68973f084d9fe24390491a45f51208d10f7919e3cb8b06358e94b26e3968d8b9
[INFO] running `Command { std: "docker" "start" "-a" "68973f084d9fe24390491a45f51208d10f7919e3cb8b06358e94b26e3968d8b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]     Checking derive_more v2.0.1
[INFO] [stderr]     Checking maelstrom-linux v0.13.0
[INFO] [stderr]     Checking maelstrom-worker-child v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.73s
[INFO] running `Command { std: "docker" "inspect" "68973f084d9fe24390491a45f51208d10f7919e3cb8b06358e94b26e3968d8b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68973f084d9fe24390491a45f51208d10f7919e3cb8b06358e94b26e3968d8b9", kill_on_drop: false }`
[INFO] [stdout] 68973f084d9fe24390491a45f51208d10f7919e3cb8b06358e94b26e3968d8b9