Sep 02 16:24:02.086 INFO checking difference-2.0.0 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53851
Sep 02 16:24:02.086 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 02 16:24:02.086 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53851/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-2/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 16:24:02.330 INFO blam! edafb50ce0610270ac5ec9afeb1991362957a5922ffbf34347d99cf1436c74c4
Sep 02 16:24:02.332 INFO running `"docker" "start" "-a" "edafb50ce0610270ac5ec9afeb1991362957a5922ffbf34347d99cf1436c74c4"`
Sep 02 16:24:03.165 INFO kablam!     Checking difference v2.0.0 (file:///source)
Sep 02 16:24:04.142 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 02 16:24:04.142 INFO kablam!    --> tests/quickcheck.rs:103:9
Sep 02 16:24:04.142 INFO kablam!     |
Sep 02 16:24:04.142 INFO kablam! 103 | #[allow(needless_pass_by_value)]
Sep 02 16:24:04.142 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 02 16:24:04.142 INFO kablam!     |
Sep 02 16:24:04.142 INFO kablam!     = note: #[warn(unknown_lints)] on by default
Sep 02 16:24:04.142 INFO kablam! 
Sep 02 16:24:06.707 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.59s
Sep 02 16:24:06.718 INFO kablam! su: No module specific data is present
Sep 02 16:24:07.312 INFO running `"docker" "rm" "-f" "edafb50ce0610270ac5ec9afeb1991362957a5922ffbf34347d99cf1436c74c4"`
Sep 02 16:24:07.440 INFO blam! edafb50ce0610270ac5ec9afeb1991362957a5922ffbf34347d99cf1436c74c4