[INFO] crate iocutil 0.1.3 is already in cache
[INFO] checking iocutil-0.1.3 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate iocutil 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate iocutil 0.1.3 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate iocutil 0.1.3
[INFO] finished tweaking crates.io crate iocutil 0.1.3
[INFO] tweaked toml for crates.io crate iocutil 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate iocutil 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9c40e96cebd14b8a6eda115e0b9c28a63c2c9187d924a0d5cc41a51ac96f38e0
[INFO] running `"docker" "start" "-a" "9c40e96cebd14b8a6eda115e0b9c28a63c2c9187d924a0d5cc41a51ac96f38e0"`
[INFO] [stderr]    Compiling libc v0.2.65
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[INFO] [stderr]     Checking iocutil v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `a1`
[INFO] [stderr]  --> examples/hash.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let a1 = SampleHash::new("d41d8cd98f00b204e9800998ecf8427e").unwrap();
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 25s
[INFO] running `"docker" "inspect" "9c40e96cebd14b8a6eda115e0b9c28a63c2c9187d924a0d5cc41a51ac96f38e0"`
[INFO] running `"docker" "rm" "-f" "9c40e96cebd14b8a6eda115e0b9c28a63c2c9187d924a0d5cc41a51ac96f38e0"`
[INFO] [stdout] 9c40e96cebd14b8a6eda115e0b9c28a63c2c9187d924a0d5cc41a51ac96f38e0