Sep 10 22:24:59.000 INFO checking backoff-0.1.2 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 22:24:59.000 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 22:24:59.000 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-7/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 22:24:59.207 INFO blam! 57ce5309cdb7ca4c1bf8e3898c20129a089fdff54f03da2a8633032ce7796a13
Sep 10 22:24:59.209 INFO running `"docker" "start" "-a" "57ce5309cdb7ca4c1bf8e3898c20129a089fdff54f03da2a8633032ce7796a13"`
Sep 10 22:25:00.327 INFO kablam! usermod: no changes
Sep 10 22:25:00.482 INFO kablam!     Checking backoff v0.1.2 (file:///source)
Sep 10 22:25:01.872 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 10 22:25:01.872 INFO kablam!   --> examples/permanent_error.rs:10:9
Sep 10 22:25:01.872 INFO kablam!    |
Sep 10 22:25:01.872 INFO kablam! 10 | #[allow(needless_pass_by_value)]
Sep 10 22:25:01.872 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 10 22:25:01.872 INFO kablam!    |
Sep 10 22:25:01.872 INFO kablam!    = note: #[warn(unknown_lints)] on by default
Sep 10 22:25:01.872 INFO kablam! 
Sep 10 22:25:05.594 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.24s
Sep 10 22:25:05.603 INFO kablam! su: No module specific data is present
Sep 10 22:25:06.674 INFO running `"docker" "rm" "-f" "57ce5309cdb7ca4c1bf8e3898c20129a089fdff54f03da2a8633032ce7796a13"`
Sep 10 22:25:06.797 INFO blam! 57ce5309cdb7ca4c1bf8e3898c20129a089fdff54f03da2a8633032ce7796a13