[INFO] fetching crate iocutil 0.1.3...
[INFO] checking iocutil-0.1.3 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[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 a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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/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" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64a7d1907716fe19da0f72e8546cecd8fa27d997fdd32b52f17cdad683a40100
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "64a7d1907716fe19da0f72e8546cecd8fa27d997fdd32b52f17cdad683a40100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64a7d1907716fe19da0f72e8546cecd8fa27d997fdd32b52f17cdad683a40100", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64a7d1907716fe19da0f72e8546cecd8fa27d997fdd32b52f17cdad683a40100", kill_on_drop: false }`
[INFO] [stdout] 64a7d1907716fe19da0f72e8546cecd8fa27d997fdd32b52f17cdad683a40100
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a618a9f5d939ed8be05c170c877388d2c58930b1092742c92f79bbbff7c5466
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9a618a9f5d939ed8be05c170c877388d2c58930b1092742c92f79bbbff7c5466", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
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[INFO] [stderr]    Compiling phf_generator v0.7.24
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[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling derive_builder_core v0.8.1
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
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[INFO] [stderr]     Checking iocutil v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]  --> examples/hash.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a1 = SampleHash::new("d41d8cd98f00b204e9800998ecf8427e").unwrap();
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` 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 1m 44s
[INFO] running `Command { std: "docker" "inspect" "9a618a9f5d939ed8be05c170c877388d2c58930b1092742c92f79bbbff7c5466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a618a9f5d939ed8be05c170c877388d2c58930b1092742c92f79bbbff7c5466", kill_on_drop: false }`
[INFO] [stdout] 9a618a9f5d939ed8be05c170c877388d2c58930b1092742c92f79bbbff7c5466