Sep 04 06:49:28.054 INFO checking rbtree-0.1.5 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 06:49:28.054 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 06:49:28.055 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-2/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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=500" "-e" "CMD=cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 06:49:28.213 INFO blam! 4f92d3391ed32fb83928490a012a8e04652bd79c2e4cd28572609a8b080526f1
Sep 04 06:49:28.215 INFO running `"docker" "start" "-a" "4f92d3391ed32fb83928490a012a8e04652bd79c2e4cd28572609a8b080526f1"`
Sep 04 06:49:29.022 INFO kablam!     Checking rbtree v0.1.5 (file:///source)
Sep 04 06:49:29.338 INFO kablam! warning: unused import: `super::RBTree`
Sep 04 06:49:29.338 INFO kablam!     --> src/lib.rs:1404:9
Sep 04 06:49:29.338 INFO kablam!      |
Sep 04 06:49:29.338 INFO kablam! 1404 |     use super::RBTree;
Sep 04 06:49:29.338 INFO kablam!      |         ^^^^^^^^^^^^^
Sep 04 06:49:29.338 INFO kablam!      |
Sep 04 06:49:29.338 INFO kablam!      = note: #[warn(unused_imports)] on by default
Sep 04 06:49:29.338 INFO kablam! 
Sep 04 06:49:30.657 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.64s
Sep 04 06:49:30.661 INFO kablam! su: No module specific data is present
Sep 04 06:49:31.050 INFO running `"docker" "rm" "-f" "4f92d3391ed32fb83928490a012a8e04652bd79c2e4cd28572609a8b080526f1"`
Sep 04 06:49:31.143 INFO blam! 4f92d3391ed32fb83928490a012a8e04652bd79c2e4cd28572609a8b080526f1