Dec 19 20:15:11.509 INFO checking asukiaaa/rust_matrix_calc_practice against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 20:15:11.509 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/asukiaaa/rust_matrix_calc_practice:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 20:15:11.765 INFO [stdout] 9412649e3852ce476cc8454e1f278f5f23813f6e665f7293a457a0e8c14d0868
Dec 19 20:15:11.768 INFO running `"docker" "start" "-a" "9412649e3852ce476cc8454e1f278f5f23813f6e665f7293a457a0e8c14d0868"`
Dec 19 20:15:13.068 INFO [stderr]     Checking itertools v0.7.4
Dec 19 20:15:14.258 INFO [stderr]     Checking ndarray v0.10.13
Dec 19 20:15:21.061 INFO [stderr]     Checking rust_matrix_calc_practice v0.1.0 (/opt/crater/workdir)
Dec 19 20:15:21.764 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.72s
Dec 19 20:15:23.086 INFO running `"docker" "inspect" "9412649e3852ce476cc8454e1f278f5f23813f6e665f7293a457a0e8c14d0868"`
Dec 19 20:15:23.378 INFO running `"docker" "rm" "-f" "9412649e3852ce476cc8454e1f278f5f23813f6e665f7293a457a0e8c14d0868"`
Dec 19 20:15:23.820 INFO [stdout] 9412649e3852ce476cc8454e1f278f5f23813f6e665f7293a457a0e8c14d0868