Sep 01 22:48:20.372 INFO checking difference-2.0.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 22:48:20.373 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 22:48:20.373 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 22:48:20.530 INFO blam! 05b34356f7a4cbfcb79aa734f0d04eda239ea1c280f077f40b07aefc5d41677e
Sep 01 22:48:20.532 INFO running `"docker" "start" "-a" "05b34356f7a4cbfcb79aa734f0d04eda239ea1c280f077f40b07aefc5d41677e"`
Sep 01 22:48:21.103 INFO kablam!     Checking difference v2.0.0 (file:///source)
Sep 01 22:48:22.279 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 01 22:48:22.280 INFO kablam!    --> tests/quickcheck.rs:103:9
Sep 01 22:48:22.280 INFO kablam!     |
Sep 01 22:48:22.280 INFO kablam! 103 | #[allow(needless_pass_by_value)]
Sep 01 22:48:22.280 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 01 22:48:22.280 INFO kablam!     |
Sep 01 22:48:22.280 INFO kablam!     = note: #[warn(unknown_lints)] on by default
Sep 01 22:48:22.280 INFO kablam! 
Sep 01 22:48:25.568 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.52s
Sep 01 22:48:25.573 INFO kablam! su: No module specific data is present
Sep 01 22:48:26.055 INFO running `"docker" "rm" "-f" "05b34356f7a4cbfcb79aa734f0d04eda239ea1c280f077f40b07aefc5d41677e"`
Sep 01 22:48:26.141 INFO blam! 05b34356f7a4cbfcb79aa734f0d04eda239ea1c280f077f40b07aefc5d41677e