Oct 12 22:32:55.803 INFO checking dmdrummond/mandelbrot against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 22:32:55.803 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-7/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-7/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 12 22:32:56.006 INFO blam! c656ff0d2409dda12056ec1a724600e3ec89eb2f327edd82c105cce4b91e40df
Oct 12 22:32:56.010 INFO running `"docker" "start" "-a" "c656ff0d2409dda12056ec1a724600e3ec89eb2f327edd82c105cce4b91e40df"`
Oct 12 22:32:56.391 INFO kablam! usermod: no changes
Oct 12 22:32:56.472 INFO kablam!     Checking rayon-core v1.3.0
Oct 12 22:32:56.472 INFO kablam!     Checking num-bigint v0.1.41
Oct 12 22:32:57.390 INFO kablam!     Checking rayon v0.8.2
Oct 12 22:32:59.205 INFO kablam!     Checking num-rational v0.1.40
Oct 12 22:33:00.614 INFO kablam!     Checking num v0.1.41
Oct 12 22:33:01.830 INFO kablam!     Checking jpeg-decoder v0.1.13
Oct 12 22:33:03.540 INFO kablam!     Checking image v0.18.0
Oct 12 22:33:08.876 INFO kablam!     Checking mandelbrot v0.1.0 (/source)
Oct 12 22:33:10.984 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 14.56s
Oct 12 22:33:10.988 INFO kablam! su: No module specific data is present
Oct 12 22:33:11.602 INFO running `"docker" "rm" "-f" "c656ff0d2409dda12056ec1a724600e3ec89eb2f327edd82c105cce4b91e40df"`
Oct 12 22:33:11.940 INFO blam! c656ff0d2409dda12056ec1a724600e3ec89eb2f327edd82c105cce4b91e40df