Sep 21 05:02:20.829 INFO checking rbtree-0.1.5 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 05:02:20.829 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 05:02:20.829 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-7/master#f7f4c500b46603386e940f116b469c7adc043a6d:/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 +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 05:02:20.995 INFO blam! 1a430e35a93323c44dd2441500796e347972554c7360e16b90bc744a3ad78bf4
Sep 21 05:02:20.997 INFO running `"docker" "start" "-a" "1a430e35a93323c44dd2441500796e347972554c7360e16b90bc744a3ad78bf4"`
Sep 21 05:02:21.666 INFO kablam! usermod: no changes
Sep 21 05:02:21.711 INFO kablam!     Checking rbtree v0.1.5 (/source)
Sep 21 05:02:21.940 INFO kablam! warning: unused import: `super::RBTree`
Sep 21 05:02:21.940 INFO kablam!     --> src/lib.rs:1404:9
Sep 21 05:02:21.940 INFO kablam!      |
Sep 21 05:02:21.940 INFO kablam! 1404 |     use super::RBTree;
Sep 21 05:02:21.940 INFO kablam!      |         ^^^^^^^^^^^^^
Sep 21 05:02:21.940 INFO kablam!      |
Sep 21 05:02:21.940 INFO kablam!      = note: #[warn(unused_imports)] on by default
Sep 21 05:02:21.940 INFO kablam! 
Sep 21 05:02:22.743 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Sep 21 05:02:22.746 INFO kablam! su: No module specific data is present
Sep 21 05:02:23.508 INFO running `"docker" "rm" "-f" "1a430e35a93323c44dd2441500796e347972554c7360e16b90bc744a3ad78bf4"`
Sep 21 05:02:23.578 INFO blam! 1a430e35a93323c44dd2441500796e347972554c7360e16b90bc744a3ad78bf4