[INFO] cloning repository https://github.com/jsimmons/concurrency
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jsimmons/concurrency" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjsimmons%2Fconcurrency", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjsimmons%2Fconcurrency'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0bddc198fbfc1f6fdd45249b8c2c65f3c99fe59b
[INFO] checking jsimmons/concurrency against master#59d99f56d8888b0e5a5866d6418df3ca1bb90013 for pr-100046
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjsimmons%2Fconcurrency" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jsimmons/concurrency on toolchain 59d99f56d8888b0e5a5866d6418df3ca1bb90013
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jsimmons/concurrency
[INFO] finished tweaking git repo https://github.com/jsimmons/concurrency
[INFO] tweaked toml for git repo https://github.com/jsimmons/concurrency written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jsimmons/concurrency already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85e2225e79ae33967d9ed7b3c97761240e5f4875ff53211421543b284cb05f24
[INFO] running `Command { std: "docker" "start" "-a" "85e2225e79ae33967d9ed7b3c97761240e5f4875ff53211421543b284cb05f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85e2225e79ae33967d9ed7b3c97761240e5f4875ff53211421543b284cb05f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85e2225e79ae33967d9ed7b3c97761240e5f4875ff53211421543b284cb05f24", kill_on_drop: false }`
[INFO] [stdout] 85e2225e79ae33967d9ed7b3c97761240e5f4875ff53211421543b284cb05f24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+59d99f56d8888b0e5a5866d6418df3ca1bb90013" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20958cd1c11439dadf4f1f90a60b72dfcbdd4f821b09945aa51b4ed474501d5d
[INFO] running `Command { std: "docker" "start" "-a" "20958cd1c11439dadf4f1f90a60b72dfcbdd4f821b09945aa51b4ed474501d5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking concurrency v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(num_fast: usize, num_slow: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(num_fast: usize, num_slow: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "20958cd1c11439dadf4f1f90a60b72dfcbdd4f821b09945aa51b4ed474501d5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20958cd1c11439dadf4f1f90a60b72dfcbdd4f821b09945aa51b4ed474501d5d", kill_on_drop: false }`
[INFO] [stdout] 20958cd1c11439dadf4f1f90a60b72dfcbdd4f821b09945aa51b4ed474501d5d