Sep 10 07:53:03.129 INFO checking threading-0.1.2 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 07:53:03.129 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 07:53:03.129 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-7/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 07:53:03.397 INFO blam! caacb0f8704ce69f558f0f55b3ce08de08bf5f6bcb45819256995e17bc3a71c5
Sep 10 07:53:03.401 INFO running `"docker" "start" "-a" "caacb0f8704ce69f558f0f55b3ce08de08bf5f6bcb45819256995e17bc3a71c5"`
Sep 10 07:53:04.504 INFO kablam! usermod: no changes
Sep 10 07:53:04.525 INFO kablam!     Checking threading v0.1.2 (file:///source)
Sep 10 07:53:04.719 INFO kablam! warning: unused arithmetic operation which must be used
Sep 10 07:53:04.719 INFO kablam!    --> src/lib.rs:165:13
Sep 10 07:53:04.719 INFO kablam!     |
Sep 10 07:53:04.719 INFO kablam! 165 |             i * i;
Sep 10 07:53:04.719 INFO kablam!     |             ^^^^^
Sep 10 07:53:04.719 INFO kablam!     |
Sep 10 07:53:04.719 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Sep 10 07:53:04.719 INFO kablam! 
Sep 10 07:53:04.748 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
Sep 10 07:53:04.751 INFO kablam! su: No module specific data is present
Sep 10 07:53:05.401 INFO running `"docker" "rm" "-f" "caacb0f8704ce69f558f0f55b3ce08de08bf5f6bcb45819256995e17bc3a71c5"`
Sep 10 07:53:05.474 INFO blam! caacb0f8704ce69f558f0f55b3ce08de08bf5f6bcb45819256995e17bc3a71c5