Sep 10 07:03:32.841 INFO checking unused_variable-1.0.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 07:03:32.841 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 07:03:32.841 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-1/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 07:03:33.080 INFO blam! a4166d24bc5b91abda07b331bbac14ec8878e47a36fcc385008f3c1889ccdd78
Sep 10 07:03:33.082 INFO running `"docker" "start" "-a" "a4166d24bc5b91abda07b331bbac14ec8878e47a36fcc385008f3c1889ccdd78"`
Sep 10 07:03:34.479 INFO kablam! usermod: no changes
Sep 10 07:03:34.548 INFO kablam!     Checking unused_variable v1.0.0 (file:///source)
Sep 10 07:03:34.926 INFO kablam! warning: expected `;`, found `<eof>`
Sep 10 07:03:34.926 INFO kablam!  --> <unused_variable macros>:1:32
Sep 10 07:03:34.926 INFO kablam!   |
Sep 10 07:03:34.926 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 10 07:03:34.926 INFO kablam!   |                                ^^^^^^
Sep 10 07:03:34.926 INFO kablam!   |
Sep 10 07:03:34.926 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 10 07:03:34.926 INFO kablam! 
Sep 10 07:03:34.952 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
Sep 10 07:03:34.957 INFO kablam! su: No module specific data is present
Sep 10 07:03:35.625 INFO running `"docker" "rm" "-f" "a4166d24bc5b91abda07b331bbac14ec8878e47a36fcc385008f3c1889ccdd78"`
Sep 10 07:03:35.760 INFO blam! a4166d24bc5b91abda07b331bbac14ec8878e47a36fcc385008f3c1889ccdd78