Sep 02 03:09:52.051 INFO checking array-queue-0.3.3 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 02 03:09:52.051 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 02 03:09:52.051 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 03:09:52.270 INFO blam! c418fe13d5ed993cfe0fc6efcec5fdfaf28623e0f09a246524f69bad4236033a
Sep 02 03:09:52.272 INFO running `"docker" "start" "-a" "c418fe13d5ed993cfe0fc6efcec5fdfaf28623e0f09a246524f69bad4236033a"`
Sep 02 03:09:53.007 INFO kablam!     Checking array-queue v0.3.3 (file:///source)
Sep 02 03:09:54.593 INFO kablam! warning: unused return value of `std::clone::Clone::clone` which must be used
Sep 02 03:09:54.594 INFO kablam!    --> src/array_queue.rs:553:9
Sep 02 03:09:54.594 INFO kablam!     |
Sep 02 03:09:54.594 INFO kablam! 553 |         a.clone();
Sep 02 03:09:54.594 INFO kablam!     |         ^^^^^^^^^^
Sep 02 03:09:54.594 INFO kablam!     |
Sep 02 03:09:54.594 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Sep 02 03:09:54.594 INFO kablam!     = note: cloning is often expensive and is not expected to have side effects
Sep 02 03:09:54.594 INFO kablam! 
Sep 02 03:09:54.614 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
Sep 02 03:09:54.616 INFO kablam! su: No module specific data is present
Sep 02 03:09:55.509 INFO running `"docker" "rm" "-f" "c418fe13d5ed993cfe0fc6efcec5fdfaf28623e0f09a246524f69bad4236033a"`
Sep 02 03:09:55.620 INFO blam! c418fe13d5ed993cfe0fc6efcec5fdfaf28623e0f09a246524f69bad4236033a