Sep 19 16:21:18.132 INFO checking unused_variable-1.0.0 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 16:21:18.132 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 16:21:18.132 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-5/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 16:21:18.467 INFO blam! 36c277f5ae0d3734a753b20c1b74b7826091af277cdc99a87503aa3651bfc96f
Sep 19 16:21:18.471 INFO running `"docker" "start" "-a" "36c277f5ae0d3734a753b20c1b74b7826091af277cdc99a87503aa3651bfc96f"`
Sep 19 16:21:20.118 INFO kablam! usermod: no changes
Sep 19 16:21:20.159 INFO kablam!     Checking unused_variable v1.0.0 (/source)
Sep 19 16:21:20.573 INFO kablam! warning: expected `;`, found `<eof>`
Sep 19 16:21:20.573 INFO kablam!  --> <unused_variable macros>:1:32
Sep 19 16:21:20.573 INFO kablam!   |
Sep 19 16:21:20.573 INFO kablam! 1 | ( $ expr : expr ) => { let _ = $ expr }
Sep 19 16:21:20.573 INFO kablam!   |                                ^^^^^^
Sep 19 16:21:20.573 INFO kablam!   |
Sep 19 16:21:20.573 INFO kablam!   = note: This was erroneously allowed and will become a hard error in a future release
Sep 19 16:21:20.573 INFO kablam! 
Sep 19 16:21:20.635 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
Sep 19 16:21:20.640 INFO kablam! su: No module specific data is present
Sep 19 16:21:21.427 INFO running `"docker" "rm" "-f" "36c277f5ae0d3734a753b20c1b74b7826091af277cdc99a87503aa3651bfc96f"`
Sep 19 16:21:21.602 INFO blam! 36c277f5ae0d3734a753b20c1b74b7826091af277cdc99a87503aa3651bfc96f