Sep 19 18:23:57.642 INFO checking unused_variable-1.0.0 against try#135b4cd023a753409d01e43b0f23d22a899feeeb for pr-54352
Sep 19 18:23:57.642 INFO running: cargo +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets
Sep 19 18:23:57.642 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54352/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-1/try#135b4cd023a753409d01e43b0f23d22a899feeeb:/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 +135b4cd023a753409d01e43b0f23d22a899feeeb-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 18:23:57.908 INFO blam! 8a47208941644b29881b64b609bd0a7d6e9dd00f5b6493f8d0b79b77a2d2f2c4
Sep 19 18:23:57.908 INFO running `"docker" "start" "-a" "8a47208941644b29881b64b609bd0a7d6e9dd00f5b6493f8d0b79b77a2d2f2c4"`
Sep 19 18:23:58.965 INFO kablam! usermod: no changes
Sep 19 18:23:59.030 INFO kablam!     Checking unused_variable v1.0.0 (/source)
Sep 19 18:23:59.418 INFO kablam! warning: expected `;`, found `<eof>`
Sep 19 18:23:59.418 INFO kablam!  --> <unused_variable macros>:1:32
Sep 19 18:23:59.418 INFO kablam!   |
Sep 19 18:23:59.418 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 19 18:23:59.418 INFO kablam!   |                                ^^^^^^
Sep 19 18:23:59.418 INFO kablam!   |
Sep 19 18:23:59.418 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 19 18:23:59.418 INFO kablam! 
Sep 19 18:23:59.502 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Sep 19 18:23:59.504 INFO kablam! su: No module specific data is present
Sep 19 18:24:00.595 INFO running `"docker" "rm" "-f" "8a47208941644b29881b64b609bd0a7d6e9dd00f5b6493f8d0b79b77a2d2f2c4"`
Sep 19 18:24:00.730 INFO blam! 8a47208941644b29881b64b609bd0a7d6e9dd00f5b6493f8d0b79b77a2d2f2c4