[INFO] updating cached repository https://github.com/ttakamura/binary-nn-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 79cf37b6b746e717a107bb7a460b6f9df00e383b
[INFO] checking ttakamura/binary-nn-rust against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fttakamura%2Fbinary-nn-rust" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ttakamura/binary-nn-rust on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ttakamura/binary-nn-rust
[INFO] finished tweaking git repo https://github.com/ttakamura/binary-nn-rust
[INFO] tweaked toml for git repo https://github.com/ttakamura/binary-nn-rust written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ttakamura/binary-nn-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 00ce9f98c07699e1c7ac43025c56a70fa8039166f52843321b5abe1e935b4a03
[INFO] running `"docker" "start" "-a" "00ce9f98c07699e1c7ac43025c56a70fa8039166f52843321b5abe1e935b4a03"`
[INFO] [stderr]     Checking bincode v1.0.0-alpha6
[INFO] [stderr]     Checking binary_nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/bitmatrix_test.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let mut x = BitMatrix2::falses((3, 34));
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/bitmatrix_test.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let mut y = BitMatrix2::falses((34, 2));
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `"docker" "inspect" "00ce9f98c07699e1c7ac43025c56a70fa8039166f52843321b5abe1e935b4a03"`
[INFO] running `"docker" "rm" "-f" "00ce9f98c07699e1c7ac43025c56a70fa8039166f52843321b5abe1e935b4a03"`
[INFO] [stdout] 00ce9f98c07699e1c7ac43025c56a70fa8039166f52843321b5abe1e935b4a03