Dec 19 19:02:18.853 INFO checking christiansakai/mandelbrot_rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:02:18.853 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/christiansakai/mandelbrot_rust:/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 19:02:19.217 INFO [stdout] a004876d707a873921aaeeeef915e860bda8785dcd2e8cf526d14234d2f38820
Dec 19 19:02:19.219 INFO running `"docker" "start" "-a" "a004876d707a873921aaeeeef915e860bda8785dcd2e8cf526d14234d2f38820"`
Dec 19 19:02:20.876 INFO [stderr]     Checking png v0.7.0
Dec 19 19:02:20.876 INFO [stderr]     Checking jpeg-decoder v0.1.15
Dec 19 19:02:22.616 INFO [stderr]     Checking image v0.13.0
Dec 19 19:02:26.536 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 19:02:27.893 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.17s
Dec 19 19:02:28.940 INFO running `"docker" "inspect" "a004876d707a873921aaeeeef915e860bda8785dcd2e8cf526d14234d2f38820"`
Dec 19 19:02:29.322 INFO running `"docker" "rm" "-f" "a004876d707a873921aaeeeef915e860bda8785dcd2e8cf526d14234d2f38820"`
Dec 19 19:02:29.772 INFO [stdout] a004876d707a873921aaeeeef915e860bda8785dcd2e8cf526d14234d2f38820