Sep 10 07:03:31.552 INFO checking unused_variable-1.0.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 07:03:31.552 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 07:03:31.552 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-6/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 07:03:31.774 INFO blam! 8506c1713531959388930b13292fcc3b4ab8e30d1bf6f87df37984bdf7687f6c
Sep 10 07:03:31.776 INFO running `"docker" "start" "-a" "8506c1713531959388930b13292fcc3b4ab8e30d1bf6f87df37984bdf7687f6c"`
Sep 10 07:03:32.935 INFO kablam! usermod: no changes
Sep 10 07:03:32.991 INFO kablam!     Checking unused_variable v1.0.0 (file:///source)
Sep 10 07:03:33.394 INFO kablam! warning: expected `;`, found `<eof>`
Sep 10 07:03:33.394 INFO kablam!  --> <unused_variable macros>:1:32
Sep 10 07:03:33.394 INFO kablam!   |
Sep 10 07:03:33.394 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 10 07:03:33.394 INFO kablam!   |                                ^^^^^^
Sep 10 07:03:33.394 INFO kablam!   |
Sep 10 07:03:33.394 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 10 07:03:33.394 INFO kablam! 
Sep 10 07:03:33.435 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Sep 10 07:03:33.444 INFO kablam! su: No module specific data is present
Sep 10 07:03:34.258 INFO running `"docker" "rm" "-f" "8506c1713531959388930b13292fcc3b4ab8e30d1bf6f87df37984bdf7687f6c"`
Sep 10 07:03:34.413 INFO blam! 8506c1713531959388930b13292fcc3b4ab8e30d1bf6f87df37984bdf7687f6c