Sep 10 20:15:17.954 INFO checking difference-2.0.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 20:15:17.954 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 20:15:17.954 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-1/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 20:15:18.198 INFO blam! a7c2758ae9b92262150d7be6153d23e32fe2486e782582729b8669aaef40fc19
Sep 10 20:15:18.200 INFO running `"docker" "start" "-a" "a7c2758ae9b92262150d7be6153d23e32fe2486e782582729b8669aaef40fc19"`
Sep 10 20:15:19.791 INFO kablam! usermod: no changes
Sep 10 20:15:19.894 INFO kablam!     Checking difference v2.0.0 (file:///source)
Sep 10 20:15:21.061 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 10 20:15:21.061 INFO kablam!    --> tests/quickcheck.rs:103:9
Sep 10 20:15:21.061 INFO kablam!     |
Sep 10 20:15:21.061 INFO kablam! 103 | #[allow(needless_pass_by_value)]
Sep 10 20:15:21.061 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 10 20:15:21.084 INFO kablam!     |
Sep 10 20:15:21.084 INFO kablam!     = note: #[warn(unknown_lints)] on by default
Sep 10 20:15:21.084 INFO kablam! 
Sep 10 20:15:23.523 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.71s
Sep 10 20:15:23.530 INFO kablam! su: No module specific data is present
Sep 10 20:15:24.905 INFO running `"docker" "rm" "-f" "a7c2758ae9b92262150d7be6153d23e32fe2486e782582729b8669aaef40fc19"`
Sep 10 20:15:25.029 INFO blam! a7c2758ae9b92262150d7be6153d23e32fe2486e782582729b8669aaef40fc19