Sep 21 00:31:09.775 INFO checking workerpool-1.1.1 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 00:31:09.775 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 00:31:09.775 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-0/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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 +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 00:31:10.017 INFO blam! 9e6d071342570698381e622ddcb55fe2c5dd158874f94fa79ead3f95fc0e3e7b
Sep 21 00:31:10.019 INFO running `"docker" "start" "-a" "9e6d071342570698381e622ddcb55fe2c5dd158874f94fa79ead3f95fc0e3e7b"`
Sep 21 00:31:11.074 INFO kablam! usermod: no changes
Sep 21 00:31:11.109 INFO kablam!     Checking workerpool v1.1.1 (/source)
Sep 21 00:31:12.038 INFO kablam! warning: unused arithmetic operation which must be used
Sep 21 00:31:12.038 INFO kablam!     --> src/lib.rs:1070:46
Sep 21 00:31:12.038 INFO kablam!      |
Sep 21 00:31:12.038 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Sep 21 00:31:12.038 INFO kablam!      |                                              ^^^^^
Sep 21 00:31:12.038 INFO kablam!      |
Sep 21 00:31:12.038 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Sep 21 00:31:12.038 INFO kablam! 
Sep 21 00:31:12.102 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
Sep 21 00:31:12.104 INFO kablam! su: No module specific data is present
Sep 21 00:31:13.408 INFO running `"docker" "rm" "-f" "9e6d071342570698381e622ddcb55fe2c5dd158874f94fa79ead3f95fc0e3e7b"`
Sep 21 00:31:13.550 INFO blam! 9e6d071342570698381e622ddcb55fe2c5dd158874f94fa79ead3f95fc0e3e7b