Sep 03 23:27:11.625 INFO checking unused_variable-1.0.0 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 03 23:27:11.625 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 03 23:27:11.626 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-0/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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=500" "-e" "CMD=cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 03 23:27:11.870 INFO blam! bd26c970422e4a387fc7b56f126ff8d121298a0bdca80ebd116e1c515052e631
Sep 03 23:27:11.872 INFO running `"docker" "start" "-a" "bd26c970422e4a387fc7b56f126ff8d121298a0bdca80ebd116e1c515052e631"`
Sep 03 23:27:12.788 INFO kablam!     Checking unused_variable v1.0.0 (file:///source)
Sep 03 23:27:13.400 INFO kablam! warning: expected `;`, found `<eof>`
Sep 03 23:27:13.400 INFO kablam!  --> <unused_variable macros>:1:32
Sep 03 23:27:13.400 INFO kablam!   |
Sep 03 23:27:13.400 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 03 23:27:13.400 INFO kablam!   |                                ^^^^^^
Sep 03 23:27:13.400 INFO kablam!   |
Sep 03 23:27:13.400 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 03 23:27:13.400 INFO kablam! 
Sep 03 23:27:13.454 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
Sep 03 23:27:13.457 INFO kablam! su: No module specific data is present
Sep 03 23:27:13.942 INFO running `"docker" "rm" "-f" "bd26c970422e4a387fc7b56f126ff8d121298a0bdca80ebd116e1c515052e631"`
Sep 03 23:27:14.102 INFO blam! bd26c970422e4a387fc7b56f126ff8d121298a0bdca80ebd116e1c515052e631