Sep 06 01:50:44.966 INFO checking rbtree-0.1.5 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 01:50:44.966 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 01:50:44.966 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-5/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 01:50:45.095 INFO blam! 5dcdf95a376f3a6e20509a478fa7636187315d6e6e14bfd34f10b56f2ab18c38
Sep 06 01:50:45.097 INFO running `"docker" "start" "-a" "5dcdf95a376f3a6e20509a478fa7636187315d6e6e14bfd34f10b56f2ab18c38"`
Sep 06 01:50:45.631 INFO kablam! usermod: no changes
Sep 06 01:50:45.649 INFO kablam!     Checking rbtree v0.1.5 (file:///source)
Sep 06 01:50:45.854 INFO kablam! warning: unused import: `super::RBTree`
Sep 06 01:50:45.854 INFO kablam!     --> src/lib.rs:1404:9
Sep 06 01:50:45.854 INFO kablam!      |
Sep 06 01:50:45.854 INFO kablam! 1404 |     use super::RBTree;
Sep 06 01:50:45.854 INFO kablam!      |         ^^^^^^^^^^^^^
Sep 06 01:50:45.854 INFO kablam!      |
Sep 06 01:50:45.854 INFO kablam!      = note: #[warn(unused_imports)] on by default
Sep 06 01:50:45.854 INFO kablam! 
Sep 06 01:50:46.658 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
Sep 06 01:50:46.660 INFO kablam! su: No module specific data is present
Sep 06 01:50:47.805 INFO running `"docker" "rm" "-f" "5dcdf95a376f3a6e20509a478fa7636187315d6e6e14bfd34f10b56f2ab18c38"`
Sep 06 01:50:47.896 INFO blam! 5dcdf95a376f3a6e20509a478fa7636187315d6e6e14bfd34f10b56f2ab18c38