[INFO] fetching crate permutation_iterator 0.1.2...
[INFO] checking permutation_iterator-0.1.2 against 1.95.0 for pr-155915
[INFO] extracting crate permutation_iterator 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate permutation_iterator 0.1.2
[INFO] finished tweaking crates.io crate permutation_iterator 0.1.2
[INFO] tweaked toml for crates.io crate permutation_iterator 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate permutation_iterator 0.1.2 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate permutation_iterator 0.1.2 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasi v0.7.0
[INFO] [stderr]   Downloaded getrandom v0.1.13
[INFO] [stderr]   Downloaded rand v0.7.2
[INFO] [stderr]   Downloaded constant_time_eq v0.1.4
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.6
[INFO] [stderr]   Downloaded c2-chacha v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae603f1730428501aef01977c090e20376ea293eae6ca6d349c6df1d41e75c74
[INFO] running `Command { std: "docker" "start" "-a" "ae603f1730428501aef01977c090e20376ea293eae6ca6d349c6df1d41e75c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae603f1730428501aef01977c090e20376ea293eae6ca6d349c6df1d41e75c74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae603f1730428501aef01977c090e20376ea293eae6ca6d349c6df1d41e75c74", kill_on_drop: false }`
[INFO] [stdout] ae603f1730428501aef01977c090e20376ea293eae6ca6d349c6df1d41e75c74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0d50186a9e3262039554c5f9ea5bbea8d62e286ce4df85b9f90b943e861d098
[INFO] running `Command { std: "docker" "start" "-a" "c0d50186a9e3262039554c5f9ea5bbea8d62e286ce4df85b9f90b943e861d098", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking constant_time_eq v0.1.4
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking permutation_iterator v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/medium.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `permutation_iterator` (bench "medium") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c0d50186a9e3262039554c5f9ea5bbea8d62e286ce4df85b9f90b943e861d098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0d50186a9e3262039554c5f9ea5bbea8d62e286ce4df85b9f90b943e861d098", kill_on_drop: false }`
[INFO] [stdout] c0d50186a9e3262039554c5f9ea5bbea8d62e286ce4df85b9f90b943e861d098
