Dec 17 21:13:12.307 INFO checking koshkin-kna/rust-learn against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 21:13:12.307 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/koshkin-kna/rust-learn:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 21:13:12.854 INFO [stdout] 49a714809bbf4d9d40d123569c635ac1f726044e605bbd696dcab15c4f30e688
Dec 17 21:13:12.856 INFO running `"docker" "start" "-a" "49a714809bbf4d9d40d123569c635ac1f726044e605bbd696dcab15c4f30e688"`
Dec 17 21:13:15.283 INFO [stderr]    Compiling num-derive v0.2.2
Dec 17 21:13:15.284 INFO [stderr]     Checking png v0.12.0
Dec 17 21:13:18.062 INFO [stderr]     Checking image v0.19.0
Dec 17 21:13:23.426 INFO [stderr]     Checking learn v0.1.0 (/opt/crater/workdir)
Dec 17 21:13:24.943 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.84s
Dec 17 21:13:26.006 INFO running `"docker" "inspect" "49a714809bbf4d9d40d123569c635ac1f726044e605bbd696dcab15c4f30e688"`
Dec 17 21:13:26.340 INFO running `"docker" "rm" "-f" "49a714809bbf4d9d40d123569c635ac1f726044e605bbd696dcab15c4f30e688"`
Dec 17 21:13:26.684 INFO [stdout] 49a714809bbf4d9d40d123569c635ac1f726044e605bbd696dcab15c4f30e688