Aug 02 14:14:04.493 INFO checking betabear-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 14:14:04.493 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:14:04.493 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:14:04.493 INFO running `"docker" "create" "-v" "/tmp/crater.4XOiUUxtoNn3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 14:14:04.709 INFO blam! 26d6a1ca9cca6a5a3c2a6b4442fbc4a6decf173fadc276ee134eef606c41cdce
Aug 02 14:14:04.711 INFO running `"docker" "start" "-a" "26d6a1ca9cca6a5a3c2a6b4442fbc4a6decf173fadc276ee134eef606c41cdce"`
Aug 02 14:14:05.850 INFO kablam!     Checking betabear v0.1.1 (file:///source)
Aug 02 14:14:08.292 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:14:08.292 INFO kablam!  --> benches/find_words.rs:1:1
Aug 02 14:14:08.292 INFO kablam!   |
Aug 02 14:14:08.292 INFO kablam! 1 | #![feature(test)]
Aug 02 14:14:08.292 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 14:14:08.292 INFO kablam! 
Aug 02 14:14:08.293 INFO kablam! error: aborting due to previous error
Aug 02 14:14:08.294 INFO kablam! 
Aug 02 14:14:08.294 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:14:08.304 INFO kablam! error: Could not compile `betabear`.
Aug 02 14:14:08.304 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 14:14:08.552 INFO kablam! error: build failed
Aug 02 14:14:08.552 INFO kablam! su: No module specific data is present
Aug 02 14:14:09.152 INFO running `"docker" "rm" "-f" "26d6a1ca9cca6a5a3c2a6b4442fbc4a6decf173fadc276ee134eef606c41cdce"`
Aug 02 14:14:09.296 INFO blam! 26d6a1ca9cca6a5a3c2a6b4442fbc4a6decf173fadc276ee134eef606c41cdce