[INFO] fetching crate rumrust 0.1.0...
[INFO] building rumrust-0.1.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate rumrust 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate rumrust 0.1.0
[INFO] finished tweaking crates.io crate rumrust 0.1.0
[INFO] tweaked toml for crates.io crate rumrust 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rumrust 0.1.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94a4b0a00ceb10c7547fb363ca1b61e6786d5089d249d34b4c23ca798156268c
[INFO] running `Command { std: "docker" "start" "-a" "94a4b0a00ceb10c7547fb363ca1b61e6786d5089d249d34b4c23ca798156268c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94a4b0a00ceb10c7547fb363ca1b61e6786d5089d249d34b4c23ca798156268c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94a4b0a00ceb10c7547fb363ca1b61e6786d5089d249d34b4c23ca798156268c", kill_on_drop: false }`
[INFO] [stdout] 94a4b0a00ceb10c7547fb363ca1b61e6786d5089d249d34b4c23ca798156268c
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1bf92c1d8f268d436cdeb6e6c3260be3d18095d1fcb7fd86470c2489725c241
[INFO] running `Command { std: "docker" "start" "-a" "c1bf92c1d8f268d436cdeb6e6c3260be3d18095d1fcb7fd86470c2489725c241", kill_on_drop: false }`
[INFO] [stderr]    Compiling rumrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/lib.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 18 |         1 => (rem[0] as u32),
[INFO] [stdout]    |              ^             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -         1 => (rem[0] as u32),
[INFO] [stdout] 18 +         1 => rem[0] as u32 ,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "c1bf92c1d8f268d436cdeb6e6c3260be3d18095d1fcb7fd86470c2489725c241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1bf92c1d8f268d436cdeb6e6c3260be3d18095d1fcb7fd86470c2489725c241", kill_on_drop: false }`
[INFO] [stdout] c1bf92c1d8f268d436cdeb6e6c3260be3d18095d1fcb7fd86470c2489725c241
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9620d6d1dff8fa03d99ff16b9a94943d20083cc5cee886bfba72e6eb91ab32e7
[INFO] running `Command { std: "docker" "start" "-a" "9620d6d1dff8fa03d99ff16b9a94943d20083cc5cee886bfba72e6eb91ab32e7", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/lib.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 18 |         1 => (rem[0] as u32),
[INFO] [stdout]    |              ^             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -         1 => (rem[0] as u32),
[INFO] [stdout] 18 +         1 => rem[0] as u32 ,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rumrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/lib.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 18 |         1 => (rem[0] as u32),
[INFO] [stdout]    |              ^             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -         1 => (rem[0] as u32),
[INFO] [stdout] 18 +         1 => rem[0] as u32 ,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "9620d6d1dff8fa03d99ff16b9a94943d20083cc5cee886bfba72e6eb91ab32e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9620d6d1dff8fa03d99ff16b9a94943d20083cc5cee886bfba72e6eb91ab32e7", kill_on_drop: false }`
[INFO] [stdout] 9620d6d1dff8fa03d99ff16b9a94943d20083cc5cee886bfba72e6eb91ab32e7