Sep 04 23:31:39.458 INFO checking backoff-0.1.2 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 23:31:39.458 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 23:31:39.458 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-0/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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 +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 23:31:39.694 INFO blam! a66d9e412a411a7e121ae65aa641538be4bc6c9d2cf6efc07efa3aceb9938232
Sep 04 23:31:39.696 INFO running `"docker" "start" "-a" "a66d9e412a411a7e121ae65aa641538be4bc6c9d2cf6efc07efa3aceb9938232"`
Sep 04 23:31:40.835 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 04 23:31:42.482 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 04 23:31:42.483 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 04 23:31:42.483 INFO kablam!    |
Sep 04 23:31:42.483 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 04 23:31:42.483 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 04 23:31:42.483 INFO kablam!    |
Sep 04 23:31:42.483 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 04 23:31:42.483 INFO kablam! 
Sep 04 23:31:48.373 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 7.74s
Sep 04 23:31:48.395 INFO kablam! su: No module specific data is present
Sep 04 23:31:48.919 INFO running `"docker" "rm" "-f" "a66d9e412a411a7e121ae65aa641538be4bc6c9d2cf6efc07efa3aceb9938232"`
Sep 04 23:31:49.076 INFO blam! a66d9e412a411a7e121ae65aa641538be4bc6c9d2cf6efc07efa3aceb9938232