Aug 02 05:06:29.990 INFO checking littlewing-0.4.0 against 1.27.2 for lazy_static-1
Aug 02 05:06:29.990 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:06:29.990 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:06:29.990 INFO running `"docker" "create" "-v" "/tmp/crater.X82Nv4QxtI0Y:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 05:06:30.231 INFO blam! 187df3ebc729398c05ffa684c8266d8b62654ba98afb6de16247338f54a62573
Aug 02 05:06:30.233 INFO running `"docker" "start" "-a" "187df3ebc729398c05ffa684c8266d8b62654ba98afb6de16247338f54a62573"`
Aug 02 05:06:31.287 INFO kablam!     Checking littlewing v0.4.0 (file:///source)
Aug 02 05:06:39.279 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 05:06:39.279 INFO kablam!  --> benches/littlewing.rs:1:1
Aug 02 05:06:39.279 INFO kablam!   |
Aug 02 05:06:39.279 INFO kablam! 1 | #![feature(test)]
Aug 02 05:06:39.279 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 05:06:39.279 INFO kablam! 
Aug 02 05:06:39.279 INFO kablam! error: aborting due to previous error
Aug 02 05:06:39.279 INFO kablam! 
Aug 02 05:06:39.279 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 05:06:39.291 INFO kablam! error: Could not compile `littlewing`.
Aug 02 05:06:39.291 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 05:06:40.159 INFO kablam! error: build failed
Aug 02 05:06:40.164 INFO kablam! su: No module specific data is present
Aug 02 05:06:40.931 INFO running `"docker" "rm" "-f" "187df3ebc729398c05ffa684c8266d8b62654ba98afb6de16247338f54a62573"`
Aug 02 05:06:41.105 INFO blam! 187df3ebc729398c05ffa684c8266d8b62654ba98afb6de16247338f54a62573