Sep 06 09:41:35.127 INFO checking backoff-0.1.2 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 09:41:35.127 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 09:41:35.127 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-7/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 09:41:35.339 INFO blam! feb85b358f3163dca23111eea71fb400fe477f1c82fd28c5cabd5df5491f2216
Sep 06 09:41:35.341 INFO running `"docker" "start" "-a" "feb85b358f3163dca23111eea71fb400fe477f1c82fd28c5cabd5df5491f2216"`
Sep 06 09:41:36.370 INFO kablam! usermod: no changes
Sep 06 09:41:36.590 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 06 09:41:37.490 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 06 09:41:37.490 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 06 09:41:37.490 INFO kablam!    |
Sep 06 09:41:37.490 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 06 09:41:37.490 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 06 09:41:37.490 INFO kablam!    |
Sep 06 09:41:37.490 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 06 09:41:37.490 INFO kablam! 
Sep 06 09:41:41.450 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.04s
Sep 06 09:41:41.466 INFO kablam! su: No module specific data is present
Sep 06 09:41:42.534 INFO running `"docker" "rm" "-f" "feb85b358f3163dca23111eea71fb400fe477f1c82fd28c5cabd5df5491f2216"`
Sep 06 09:41:42.631 INFO blam! feb85b358f3163dca23111eea71fb400fe477f1c82fd28c5cabd5df5491f2216