[INFO] fetching crate smawk 0.1.0...
[INFO] checking smawk-0.1.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate smawk 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate smawk 0.1.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate smawk 0.1.0
[INFO] finished tweaking crates.io crate smawk 0.1.0
[INFO] tweaked toml for crates.io crate smawk 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 7316f6bf735493fff5205c89a737b4c2b4d4c3be6bb705b57799c58adee30291
[INFO] running `"docker" "start" "-a" "7316f6bf735493fff5205c89a737b4c2b4d4c3be6bb705b57799c58adee30291"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pulldown-cmark v0.0.11
[INFO] [stderr]     Checking syntex_pos v0.58.1
[INFO] [stderr]     Checking unicode-bidi v0.3.3
[INFO] [stderr]    Compiling rand_derive v0.3.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking syntex_errors v0.58.1
[INFO] [stderr]     Checking smawk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking syntex_syntax v0.58.1
[INFO] [stderr]     Checking version-sync v0.3.1
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/complexity.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut matrix: Array2<i32> = random_monge_matrix(size, size, &mut rng);
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.10s
[INFO] running `"docker" "inspect" "7316f6bf735493fff5205c89a737b4c2b4d4c3be6bb705b57799c58adee30291"`
[INFO] running `"docker" "rm" "-f" "7316f6bf735493fff5205c89a737b4c2b4d4c3be6bb705b57799c58adee30291"`
[INFO] [stdout] 7316f6bf735493fff5205c89a737b4c2b4d4c3be6bb705b57799c58adee30291