Sep 17 15:27:49.560 INFO checking unused_variable-1.0.0 against try#cfeeefe83c83bceb55d60d7e2be173db7597ed50 for pr-54033
Sep 17 15:27:49.560 INFO running: cargo +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets
Sep 17 15:27:49.560 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54033/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-4/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/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 +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 15:27:49.856 INFO blam! 92e47cd0011e525fe4aad65aae6808e71d64a7ec54589551fd9948649759056e
Sep 17 15:27:49.867 INFO running `"docker" "start" "-a" "92e47cd0011e525fe4aad65aae6808e71d64a7ec54589551fd9948649759056e"`
Sep 17 15:27:51.281 INFO kablam! usermod: no changes
Sep 17 15:27:51.314 INFO kablam!     Checking unused_variable v1.0.0 (/source)
Sep 17 15:27:51.791 INFO kablam! warning: expected `;`, found `<eof>`
Sep 17 15:27:51.791 INFO kablam!  --> <unused_variable macros>:1:32
Sep 17 15:27:51.791 INFO kablam!   |
Sep 17 15:27:51.791 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 17 15:27:51.791 INFO kablam!   |                                ^^^^^^
Sep 17 15:27:51.791 INFO kablam!   |
Sep 17 15:27:51.791 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 17 15:27:51.791 INFO kablam! 
Sep 17 15:27:51.843 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
Sep 17 15:27:51.847 INFO kablam! su: No module specific data is present
Sep 17 15:27:52.479 INFO running `"docker" "rm" "-f" "92e47cd0011e525fe4aad65aae6808e71d64a7ec54589551fd9948649759056e"`
Sep 17 15:27:52.553 INFO blam! 92e47cd0011e525fe4aad65aae6808e71d64a7ec54589551fd9948649759056e