Oct 12 15:49:44.775 INFO checking pftbest/rcom against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 15:49:44.776 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-1/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/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 15:49:45.202 INFO blam! ef3692d46be2439ad7731f2dad1704f3534122016d977360007b28982900d1ad
Oct 12 15:49:45.204 INFO running `"docker" "start" "-a" "ef3692d46be2439ad7731f2dad1704f3534122016d977360007b28982900d1ad"`
Oct 12 15:49:46.839 INFO kablam! usermod: no changes
Oct 12 15:49:47.041 INFO kablam!     Checking term_size v0.3.0
Oct 12 15:49:47.041 INFO kablam!     Checking ioctl-rs v0.1.5
Oct 12 15:49:47.041 INFO kablam!     Checking termios v0.2.2
Oct 12 15:49:47.042 INFO kablam!     Checking iovec v0.1.0
Oct 12 15:49:47.042 INFO kablam!     Checking net2 v0.2.29
Oct 12 15:49:48.232 INFO kablam!     Checking clap v2.24.2
Oct 12 15:49:48.469 INFO kablam!     Checking serial v0.3.4
Oct 12 15:49:48.641 INFO kablam!     Checking mio v0.6.7
Oct 12 15:49:55.565 INFO kablam!     Checking rcom v0.1.1 (/source)
Oct 12 15:49:56.504 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 9.64s
Oct 12 15:49:56.517 INFO kablam! su: No module specific data is present
Oct 12 15:49:57.407 INFO running `"docker" "rm" "-f" "ef3692d46be2439ad7731f2dad1704f3534122016d977360007b28982900d1ad"`
Oct 12 15:49:57.744 INFO blam! ef3692d46be2439ad7731f2dad1704f3534122016d977360007b28982900d1ad