Sep 17 23:15:36.164 INFO checking hamt-rs-0.3.0 against try#cfeeefe83c83bceb55d60d7e2be173db7597ed50 for pr-54033
Sep 17 23:15:36.164 INFO running: cargo +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets
Sep 17 23:15:36.164 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54033/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-4/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/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 +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 23:15:36.599 INFO blam! 1439cb709c80e9566246e512812c3d095e5100c462fb0c957bf89d0ea3464916
Sep 17 23:15:36.601 INFO running `"docker" "start" "-a" "1439cb709c80e9566246e512812c3d095e5100c462fb0c957bf89d0ea3464916"`
Sep 17 23:15:37.570 INFO kablam! usermod: no changes
Sep 17 23:15:37.598 INFO kablam!     Checking hamt-rs v0.3.0 (/source)
Sep 17 23:15:39.496 INFO kablam! warning: unused return value of `std::clone::Clone::clone` which must be used
Sep 17 23:15:39.496 INFO kablam!    --> benches/benches.rs:165:9
Sep 17 23:15:39.496 INFO kablam!     |
Sep 17 23:15:39.496 INFO kablam! 165 |         map.clone();
Sep 17 23:15:39.496 INFO kablam!     |         ^^^^^^^^^^^^
Sep 17 23:15:39.496 INFO kablam!     |
Sep 17 23:15:39.496 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Sep 17 23:15:39.496 INFO kablam!     = note: cloning is often expensive and is not expected to have side effects
Sep 17 23:15:39.496 INFO kablam! 
Sep 17 23:15:39.516 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
Sep 17 23:15:39.519 INFO kablam! su: No module specific data is present
Sep 17 23:15:40.189 INFO running `"docker" "rm" "-f" "1439cb709c80e9566246e512812c3d095e5100c462fb0c957bf89d0ea3464916"`
Sep 17 23:15:40.471 INFO blam! 1439cb709c80e9566246e512812c3d095e5100c462fb0c957bf89d0ea3464916