Sep 19 16:21:16.804 INFO checking unused_variable-1.0.0 against try#fcacde07b66fe513e52c41b73aef91bcc121905b for pr-54346
Sep 19 16:21:16.804 INFO running: cargo +fcacde07b66fe513e52c41b73aef91bcc121905b-alt check --frozen --all --all-targets
Sep 19 16:21:16.804 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54346/try#fcacde07b66fe513e52c41b73aef91bcc121905b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-2/try#fcacde07b66fe513e52c41b73aef91bcc121905b:/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 +fcacde07b66fe513e52c41b73aef91bcc121905b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 16:21:17.204 INFO blam! 9f324285a508393a0ed00c98e186754f3bcb70b25094ff84074d0ec38042df3a
Sep 19 16:21:17.207 INFO running `"docker" "start" "-a" "9f324285a508393a0ed00c98e186754f3bcb70b25094ff84074d0ec38042df3a"`
Sep 19 16:21:18.710 INFO kablam! usermod: no changes
Sep 19 16:21:18.791 INFO kablam!     Checking unused_variable v1.0.0 (/source)
Sep 19 16:21:19.195 INFO kablam! warning: expected `;`, found `<eof>`
Sep 19 16:21:19.195 INFO kablam!  --> <unused_variable macros>:1:32
Sep 19 16:21:19.195 INFO kablam!   |
Sep 19 16:21:19.195 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 19 16:21:19.195 INFO kablam!   |                                ^^^^^^
Sep 19 16:21:19.195 INFO kablam!   |
Sep 19 16:21:19.195 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 19 16:21:19.195 INFO kablam! 
Sep 19 16:21:19.238 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Sep 19 16:21:19.242 INFO kablam! su: No module specific data is present
Sep 19 16:21:20.239 INFO running `"docker" "rm" "-f" "9f324285a508393a0ed00c98e186754f3bcb70b25094ff84074d0ec38042df3a"`
Sep 19 16:21:20.507 INFO blam! 9f324285a508393a0ed00c98e186754f3bcb70b25094ff84074d0ec38042df3a