Sep 10 12:10:12.086 INFO checking rbtree-0.1.5 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 12:10:12.086 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 12:10:12.086 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-2/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 12:10:12.228 INFO blam! 12bbd38592cd88c9c7b18e2c452fdbaa91f81c663d382ff95e6505b5c1ae163c
Sep 10 12:10:12.231 INFO running `"docker" "start" "-a" "12bbd38592cd88c9c7b18e2c452fdbaa91f81c663d382ff95e6505b5c1ae163c"`
Sep 10 12:10:13.041 INFO kablam! usermod: no changes
Sep 10 12:10:13.074 INFO kablam!     Checking rbtree v0.1.5 (file:///source)
Sep 10 12:10:13.593 INFO kablam! warning: unused import: `super::RBTree`
Sep 10 12:10:13.593 INFO kablam!     --> src/lib.rs:1404:9
Sep 10 12:10:13.593 INFO kablam!      |
Sep 10 12:10:13.593 INFO kablam! 1404 |     use super::RBTree;
Sep 10 12:10:13.593 INFO kablam!      |         ^^^^^^^^^^^^^
Sep 10 12:10:13.593 INFO kablam!      |
Sep 10 12:10:13.593 INFO kablam!      = note: #[warn(unused_imports)] on by default
Sep 10 12:10:13.593 INFO kablam! 
Sep 10 12:10:14.354 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
Sep 10 12:10:14.362 INFO kablam! su: No module specific data is present
Sep 10 12:10:14.891 INFO running `"docker" "rm" "-f" "12bbd38592cd88c9c7b18e2c452fdbaa91f81c663d382ff95e6505b5c1ae163c"`
Sep 10 12:10:14.980 INFO blam! 12bbd38592cd88c9c7b18e2c452fdbaa91f81c663d382ff95e6505b5c1ae163c