Sep 02 20:10:40.504 INFO checking backoff-0.1.2 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 20:10:40.504 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 20:10:40.504 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-3/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 20:10:40.787 INFO blam! fba33b5824517d42ea17d0642f36bc4e20b56c425c38e0979fc4f02c8fc06791
Sep 02 20:10:40.789 INFO running `"docker" "start" "-a" "fba33b5824517d42ea17d0642f36bc4e20b56c425c38e0979fc4f02c8fc06791"`
Sep 02 20:10:42.084 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 02 20:10:43.659 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 02 20:10:43.659 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 02 20:10:43.659 INFO kablam!    |
Sep 02 20:10:43.659 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 02 20:10:43.659 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 02 20:10:43.659 INFO kablam!    |
Sep 02 20:10:43.659 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 02 20:10:43.659 INFO kablam! 
Sep 02 20:10:50.060 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 8.16s
Sep 02 20:10:50.075 INFO kablam! su: No module specific data is present
Sep 02 20:10:50.586 INFO running `"docker" "rm" "-f" "fba33b5824517d42ea17d0642f36bc4e20b56c425c38e0979fc4f02c8fc06791"`
Sep 02 20:10:50.748 INFO blam! fba33b5824517d42ea17d0642f36bc4e20b56c425c38e0979fc4f02c8fc06791