Sep 10 06:13:27.996 INFO checking workerpool-1.1.1 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 06:13:27.996 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 06:13:27.996 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-0/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 06:13:28.220 INFO blam! 13006081d9c68db0b495a698ae13038536fb8ba589d121da7f05a485825d73ed
Sep 10 06:13:28.222 INFO running `"docker" "start" "-a" "13006081d9c68db0b495a698ae13038536fb8ba589d121da7f05a485825d73ed"`
Sep 10 06:13:29.302 INFO kablam! usermod: no changes
Sep 10 06:13:29.382 INFO kablam!     Checking workerpool v1.1.1 (file:///source)
Sep 10 06:13:30.362 INFO kablam! warning: unused arithmetic operation which must be used
Sep 10 06:13:30.362 INFO kablam!     --> src/lib.rs:1070:46
Sep 10 06:13:30.362 INFO kablam!      |
Sep 10 06:13:30.362 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Sep 10 06:13:30.362 INFO kablam!      |                                              ^^^^^
Sep 10 06:13:30.362 INFO kablam!      |
Sep 10 06:13:30.362 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Sep 10 06:13:30.362 INFO kablam! 
Sep 10 06:13:30.386 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Sep 10 06:13:30.388 INFO kablam! su: No module specific data is present
Sep 10 06:13:31.298 INFO running `"docker" "rm" "-f" "13006081d9c68db0b495a698ae13038536fb8ba589d121da7f05a485825d73ed"`
Sep 10 06:13:31.422 INFO blam! 13006081d9c68db0b495a698ae13038536fb8ba589d121da7f05a485825d73ed