Sep 06 09:41:37.208 INFO checking backoff-0.1.2 against master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6 for pr-53854
Sep 06 09:41:37.208 INFO running: cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets
Sep 06 09:41:37.208 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-53854/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-5/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/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 +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 09:41:37.454 INFO blam! d1ebf040a702161712db58fa8b4b47a8e72acb025a5774a49e4226bc1962eebb
Sep 06 09:41:37.456 INFO running `"docker" "start" "-a" "d1ebf040a702161712db58fa8b4b47a8e72acb025a5774a49e4226bc1962eebb"`
Sep 06 09:41:39.757 INFO kablam! usermod: no changes
Sep 06 09:41:40.000 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 06 09:41:40.985 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 06 09:41:40.985 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 06 09:41:40.985 INFO kablam!    |
Sep 06 09:41:40.985 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 06 09:41:40.985 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 06 09:41:41.002 INFO kablam!    |
Sep 06 09:41:41.002 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 06 09:41:41.002 INFO kablam! 
Sep 06 09:41:43.838 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.04s
Sep 06 09:41:43.843 INFO kablam! su: No module specific data is present
Sep 06 09:41:44.690 INFO running `"docker" "rm" "-f" "d1ebf040a702161712db58fa8b4b47a8e72acb025a5774a49e4226bc1962eebb"`
Sep 06 09:41:44.791 INFO blam! d1ebf040a702161712db58fa8b4b47a8e72acb025a5774a49e4226bc1962eebb