Sep 02 02:39:17.125 INFO checking backoff-0.1.2 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 02 02:39:17.125 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 02 02:39:17.125 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/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 02 02:39:17.392 INFO blam! 632dcfb0bb4b9cd4c5aa9fc3a411a6971e636a2a4eb14c138da9ce3654bb1f25
Sep 02 02:39:17.394 INFO running `"docker" "start" "-a" "632dcfb0bb4b9cd4c5aa9fc3a411a6971e636a2a4eb14c138da9ce3654bb1f25"`
Sep 02 02:39:18.450 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 02 02:39:19.930 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 02 02:39:19.930 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 02 02:39:19.930 INFO kablam!    |
Sep 02 02:39:19.930 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 02 02:39:19.930 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 02 02:39:19.936 INFO kablam!    |
Sep 02 02:39:19.936 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 02 02:39:19.937 INFO kablam! 
Sep 02 02:39:26.189 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 7.93s
Sep 02 02:39:26.216 INFO kablam! su: No module specific data is present
Sep 02 02:39:26.839 INFO running `"docker" "rm" "-f" "632dcfb0bb4b9cd4c5aa9fc3a411a6971e636a2a4eb14c138da9ce3654bb1f25"`
Sep 02 02:39:26.993 INFO blam! 632dcfb0bb4b9cd4c5aa9fc3a411a6971e636a2a4eb14c138da9ce3654bb1f25