[INFO] updating cached repository https://github.com/howeih/Day-44-Gradient-Approximation
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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] 2084d871af03aa6c7222140a786a5024c732aeea
[INFO] checking howeih/Day-44-Gradient-Approximation against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoweih%2FDay-44-Gradient-Approximation" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/howeih/Day-44-Gradient-Approximation on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/howeih/Day-44-Gradient-Approximation
[INFO] finished tweaking git repo https://github.com/howeih/Day-44-Gradient-Approximation
[INFO] tweaked toml for git repo https://github.com/howeih/Day-44-Gradient-Approximation written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/howeih/Day-44-Gradient-Approximation already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/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] 3a2715c57a6ff4f7580cde7c31b7ece70c10df37be98919b69fd772cba09b3f7
[INFO] running `"docker" "start" "-a" "3a2715c57a6ff4f7580cde7c31b7ece70c10df37be98919b69fd772cba09b3f7"`
[INFO] [stderr]    Compiling ndarray v0.11.2
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking gradient_approximation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.19s
[INFO] running `"docker" "inspect" "3a2715c57a6ff4f7580cde7c31b7ece70c10df37be98919b69fd772cba09b3f7"`
[INFO] running `"docker" "rm" "-f" "3a2715c57a6ff4f7580cde7c31b7ece70c10df37be98919b69fd772cba09b3f7"`
[INFO] [stdout] 3a2715c57a6ff4f7580cde7c31b7ece70c10df37be98919b69fd772cba09b3f7