Aug 02 04:54:03.065 INFO checking luhnmod10-1.1.0 against 1.27.2 for lazy_static-1
Aug 02 04:54:03.065 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:54:03.065 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:54:03.065 INFO running `"docker" "create" "-v" "/tmp/crater.hdK32mUAbHyD:/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 04:54:03.359 INFO blam! 8ee1ecbc4532014a8abbe59e567650f4955cc0f5f5a883978b7ae98292f80cb6
Aug 02 04:54:03.401 INFO running `"docker" "start" "-a" "8ee1ecbc4532014a8abbe59e567650f4955cc0f5f5a883978b7ae98292f80cb6"`
Aug 02 04:54:04.866 INFO kablam!     Checking luhnmod10 v1.1.0 (file:///source)
Aug 02 04:54:06.346 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:54:06.346 INFO kablam!  --> benches/lib.rs:1:1
Aug 02 04:54:06.346 INFO kablam!   |
Aug 02 04:54:06.346 INFO kablam! 1 | #![feature(test)]
Aug 02 04:54:06.346 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:54:06.356 INFO kablam! 
Aug 02 04:54:06.357 INFO kablam! error: aborting due to previous error
Aug 02 04:54:06.357 INFO kablam! 
Aug 02 04:54:06.358 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:54:06.373 INFO kablam! error: Could not compile `luhnmod10`.
Aug 02 04:54:06.373 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 04:54:06.484 INFO kablam! error: build failed
Aug 02 04:54:06.485 INFO kablam! su: No module specific data is present
Aug 02 04:54:07.186 INFO running `"docker" "rm" "-f" "8ee1ecbc4532014a8abbe59e567650f4955cc0f5f5a883978b7ae98292f80cb6"`
Aug 02 04:54:07.373 INFO blam! 8ee1ecbc4532014a8abbe59e567650f4955cc0f5f5a883978b7ae98292f80cb6