Sep 10 08:15:17.529 INFO checking superslice-0.1.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 08:15:17.529 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 08:15:17.529 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 08:15:17.795 INFO blam! 675ad6f8e7adb771473254360ba1a463b6a6bdefec1d4aa018446678910e57f1
Sep 10 08:15:17.798 INFO running `"docker" "start" "-a" "675ad6f8e7adb771473254360ba1a463b6a6bdefec1d4aa018446678910e57f1"`
Sep 10 08:15:18.871 INFO kablam! usermod: no changes
Sep 10 08:15:18.966 INFO kablam!     Checking superslice v0.1.0 (file:///source)
Sep 10 08:15:19.466 INFO kablam! warning: unused import: `superslice::Ext`
Sep 10 08:15:19.466 INFO kablam!   --> benches/bench.rs:23:5
Sep 10 08:15:19.466 INFO kablam!    |
Sep 10 08:15:19.466 INFO kablam! 23 | use superslice::Ext;
Sep 10 08:15:19.466 INFO kablam!    |     ^^^^^^^^^^^^^^^
Sep 10 08:15:19.466 INFO kablam!    |
Sep 10 08:15:19.466 INFO kablam!    = note: #[warn(unused_imports)] on by default
Sep 10 08:15:19.466 INFO kablam! 
Sep 10 08:15:19.662 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
Sep 10 08:15:19.666 INFO kablam! su: No module specific data is present
Sep 10 08:15:20.422 INFO running `"docker" "rm" "-f" "675ad6f8e7adb771473254360ba1a463b6a6bdefec1d4aa018446678910e57f1"`
Sep 10 08:15:20.594 INFO blam! 675ad6f8e7adb771473254360ba1a463b6a6bdefec1d4aa018446678910e57f1