Oct 13 17:38:52.974 INFO checking bitlab-0.8.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 17:38:52.975 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-0/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/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 13 17:38:53.235 INFO blam! deb63602686876305a50496eda08bb2afd3055be560b5f25f924b381967e98b1
Oct 13 17:38:53.249 INFO running `"docker" "start" "-a" "deb63602686876305a50496eda08bb2afd3055be560b5f25f924b381967e98b1"`
Oct 13 17:38:53.909 INFO kablam! usermod: no changes
Oct 13 17:38:53.979 INFO kablam!     Checking bitlab v0.8.1 (/source)
Oct 13 17:38:56.481 INFO kablam! warning: `#[derive]` does nothing on macro invocations
Oct 13 17:38:56.481 INFO kablam!   --> examples/performance.rs:16:1
Oct 13 17:38:56.481 INFO kablam!    |
Oct 13 17:38:56.482 INFO kablam! 16 | #[derive(Debug)]
Oct 13 17:38:56.482 INFO kablam!    | ^^^^^^^^^^^^^^^^
Oct 13 17:38:56.482 INFO kablam!    |
Oct 13 17:38:56.483 INFO kablam!    = note: this may become a hard error in a future release
Oct 13 17:38:56.483 INFO kablam! 
Oct 13 17:39:00.552 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.62s
Oct 13 17:39:00.552 INFO kablam! su: No module specific data is present
Oct 13 17:39:01.090 INFO running `"docker" "rm" "-f" "deb63602686876305a50496eda08bb2afd3055be560b5f25f924b381967e98b1"`
Oct 13 17:39:01.249 INFO blam! deb63602686876305a50496eda08bb2afd3055be560b5f25f924b381967e98b1