Oct 12 13:37:40.708 INFO checking sinitcin/poll_engine against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 13:37:40.710 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-5/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-5/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 13:37:41.151 INFO blam! b1211d3a3d4e8d7b5859d72f14be0619c75bb5f6c1f8cf23f9ff2f21f5566e03
Oct 12 13:37:41.152 INFO running `"docker" "start" "-a" "b1211d3a3d4e8d7b5859d72f14be0619c75bb5f6c1f8cf23f9ff2f21f5566e03"`
Oct 12 13:37:43.176 INFO kablam! usermod: no changes
Oct 12 13:37:43.296 INFO kablam!     Checking serial-core v0.4.0
Oct 12 13:37:43.296 INFO kablam!     Checking termios v0.2.2
Oct 12 13:37:43.320 INFO kablam!     Checking ioctl-rs v0.1.6
Oct 12 13:37:43.320 INFO kablam!     Checking uuid v0.5.1
Oct 12 13:37:44.533 INFO kablam!     Checking serial-unix v0.4.0
Oct 12 13:37:45.043 INFO kablam!     Checking serial v0.4.0
Oct 12 13:37:45.421 INFO kablam!     Checking channel v0.1.0 (/source)
Oct 12 13:37:46.197 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.00s
Oct 12 13:37:46.204 INFO kablam! su: No module specific data is present
Oct 12 13:37:47.695 INFO running `"docker" "rm" "-f" "b1211d3a3d4e8d7b5859d72f14be0619c75bb5f6c1f8cf23f9ff2f21f5566e03"`
Oct 12 13:37:48.000 INFO blam! b1211d3a3d4e8d7b5859d72f14be0619c75bb5f6c1f8cf23f9ff2f21f5566e03