Sep 04 02:51:11.391 INFO checking unused_variable-1.0.0 against master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8 for pr-53913
Sep 04 02:51:11.391 INFO running: cargo +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets
Sep 04 02:51:11.392 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53913/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-2/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/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 +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 02:51:11.631 INFO blam! 0e799ebe7094e2b6e7648c0d998641d4b0146c955350d83da96ea205e05f54d9
Sep 04 02:51:11.633 INFO running `"docker" "start" "-a" "0e799ebe7094e2b6e7648c0d998641d4b0146c955350d83da96ea205e05f54d9"`
Sep 04 02:51:12.405 INFO kablam!     Checking unused_variable v1.0.0 (file:///source)
Sep 04 02:51:12.809 INFO kablam! warning: expected `;`, found `<eof>`
Sep 04 02:51:12.809 INFO kablam!  --> <unused_variable macros>:1:32
Sep 04 02:51:12.809 INFO kablam!   |
Sep 04 02:51:12.809 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 04 02:51:12.809 INFO kablam!   |                                ^^^^^^
Sep 04 02:51:12.809 INFO kablam!   |
Sep 04 02:51:12.809 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 04 02:51:12.809 INFO kablam! 
Sep 04 02:51:12.852 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
Sep 04 02:51:12.863 INFO kablam! su: No module specific data is present
Sep 04 02:51:13.279 INFO running `"docker" "rm" "-f" "0e799ebe7094e2b6e7648c0d998641d4b0146c955350d83da96ea205e05f54d9"`
Sep 04 02:51:13.366 INFO blam! 0e799ebe7094e2b6e7648c0d998641d4b0146c955350d83da96ea205e05f54d9