Sep 17 15:27:50.366 INFO checking unused_variable-1.0.0 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 17 15:27:50.366 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 17 15:27:50.366 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-2/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 15:27:50.727 INFO blam! f921fffd80e5a995dce084530f7a9b8ed8769e0497aac82f1c86e662aded447d
Sep 17 15:27:50.729 INFO running `"docker" "start" "-a" "f921fffd80e5a995dce084530f7a9b8ed8769e0497aac82f1c86e662aded447d"`
Sep 17 15:27:51.866 INFO kablam! usermod: no changes
Sep 17 15:27:51.900 INFO kablam!     Checking unused_variable v1.0.0 (/source)
Sep 17 15:27:52.169 INFO kablam! warning: expected `;`, found `<eof>`
Sep 17 15:27:52.169 INFO kablam!  --> <unused_variable macros>:1:32
Sep 17 15:27:52.169 INFO kablam!   |
Sep 17 15:27:52.169 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 17 15:27:52.169 INFO kablam!   |                                ^^^^^^
Sep 17 15:27:52.169 INFO kablam!   |
Sep 17 15:27:52.169 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 17 15:27:52.169 INFO kablam! 
Sep 17 15:27:52.215 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Sep 17 15:27:52.218 INFO kablam! su: No module specific data is present
Sep 17 15:27:52.934 INFO running `"docker" "rm" "-f" "f921fffd80e5a995dce084530f7a9b8ed8769e0497aac82f1c86e662aded447d"`
Sep 17 15:27:53.025 INFO blam! f921fffd80e5a995dce084530f7a9b8ed8769e0497aac82f1c86e662aded447d