Dec 19 22:03:42.042 INFO checking RustStudy/mandelbrot against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 22:03:42.042 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/RustStudy/mandelbrot:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 22:03:42.315 INFO [stdout] a7eb68344ba711fbe721f99b27544a413c8625e767fcc0d6644da3c49ec99ce5
Dec 19 22:03:42.340 INFO running `"docker" "start" "-a" "a7eb68344ba711fbe721f99b27544a413c8625e767fcc0d6644da3c49ec99ce5"`
Dec 19 22:03:43.265 INFO [stderr]     Checking num-bigint v0.1.39
Dec 19 22:03:44.143 INFO [stderr]     Checking num-rational v0.1.38
Dec 19 22:03:44.590 INFO [stderr]     Checking image v0.13.0
Dec 19 22:03:44.590 INFO [stderr]     Checking num v0.1.39
Dec 19 22:03:48.253 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 22:03:48.925 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.75s
Dec 19 22:03:49.198 INFO running `"docker" "inspect" "a7eb68344ba711fbe721f99b27544a413c8625e767fcc0d6644da3c49ec99ce5"`
Dec 19 22:03:49.294 INFO running `"docker" "rm" "-f" "a7eb68344ba711fbe721f99b27544a413c8625e767fcc0d6644da3c49ec99ce5"`
Dec 19 22:03:49.368 INFO [stdout] a7eb68344ba711fbe721f99b27544a413c8625e767fcc0d6644da3c49ec99ce5