Sep 19 15:35:47.070 INFO checking workerpool-1.1.1 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 15:35:47.070 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 15:35:47.071 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-3/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 15:35:47.202 INFO blam! 43d740922d59e71c1e8c45a7350cad201a81abc8c7a1028f9cb39f3889b854a6
Sep 19 15:35:47.207 INFO running `"docker" "start" "-a" "43d740922d59e71c1e8c45a7350cad201a81abc8c7a1028f9cb39f3889b854a6"`
Sep 19 15:35:47.941 INFO kablam! usermod: no changes
Sep 19 15:35:47.979 INFO kablam!     Checking workerpool v1.1.1 (/source)
Sep 19 15:35:48.659 INFO kablam! warning: unused arithmetic operation which must be used
Sep 19 15:35:48.659 INFO kablam!     --> src/lib.rs:1070:46
Sep 19 15:35:48.659 INFO kablam!      |
Sep 19 15:35:48.659 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Sep 19 15:35:48.659 INFO kablam!      |                                              ^^^^^
Sep 19 15:35:48.659 INFO kablam!      |
Sep 19 15:35:48.659 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Sep 19 15:35:48.659 INFO kablam! 
Sep 19 15:35:48.674 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
Sep 19 15:35:48.677 INFO kablam! su: No module specific data is present
Sep 19 15:35:49.305 INFO running `"docker" "rm" "-f" "43d740922d59e71c1e8c45a7350cad201a81abc8c7a1028f9cb39f3889b854a6"`
Sep 19 15:35:49.493 INFO blam! 43d740922d59e71c1e8c45a7350cad201a81abc8c7a1028f9cb39f3889b854a6