Dec 18 14:52:16.312 INFO checking is_prime-1.0.5 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 14:52:16.313 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/reg/is_prime/1.0.5:/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 18 14:52:16.778 INFO [stdout] f779e61bb97603d313d8d0e12e273905d6b5b9a5122e1e7245cd1204d4f9c25d
Dec 18 14:52:16.784 INFO running `"docker" "start" "-a" "f779e61bb97603d313d8d0e12e273905d6b5b9a5122e1e7245cd1204d4f9c25d"`
Dec 18 14:52:18.678 INFO [stderr]    Compiling rustc-cfg v0.2.0
Dec 18 14:52:18.710 INFO [stderr]    Compiling num-bigint v0.1.44
Dec 18 14:52:22.851 INFO [stderr]    Compiling ramp v0.5.1
Dec 18 14:52:26.325 INFO [stderr]     Checking is_prime v1.0.5 (/opt/crater/workdir)
Dec 18 14:52:27.376 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.78s
Dec 18 14:52:27.993 INFO running `"docker" "inspect" "f779e61bb97603d313d8d0e12e273905d6b5b9a5122e1e7245cd1204d4f9c25d"`
Dec 18 14:52:28.232 INFO running `"docker" "rm" "-f" "f779e61bb97603d313d8d0e12e273905d6b5b9a5122e1e7245cd1204d4f9c25d"`
Dec 18 14:52:28.599 INFO [stdout] f779e61bb97603d313d8d0e12e273905d6b5b9a5122e1e7245cd1204d4f9c25d