Aug 02 04:34:20.137 INFO checking md-5-0.7.0 against 1.27.2 for lazy_static-1
Aug 02 04:34:20.137 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:34:20.137 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:34:20.138 INFO running `"docker" "create" "-v" "/tmp/crater.Hrydwpcm3oIc:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2:/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 04:34:20.350 INFO blam! f197bd6c5ce4d23ce8e1da75631f7b879ace43f59faba3f892a547bc5c589f3f
Aug 02 04:34:20.353 INFO running `"docker" "start" "-a" "f197bd6c5ce4d23ce8e1da75631f7b879ace43f59faba3f892a547bc5c589f3f"`
Aug 02 04:34:21.367 INFO kablam!     Checking md-5 v0.7.0 (file:///source)
Aug 02 04:34:23.706 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:34:23.706 INFO kablam!  --> benches/lib.rs:2:1
Aug 02 04:34:23.706 INFO kablam!   |
Aug 02 04:34:23.706 INFO kablam! 2 | #![feature(test)]
Aug 02 04:34:23.706 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:34:23.706 INFO kablam! 
Aug 02 04:34:23.707 INFO kablam! error: aborting due to previous error
Aug 02 04:34:23.707 INFO kablam! 
Aug 02 04:34:23.708 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:34:23.729 INFO kablam! error: Could not compile `md-5`.
Aug 02 04:34:23.730 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 04:34:23.850 INFO kablam! error: build failed
Aug 02 04:34:23.853 INFO kablam! su: No module specific data is present
Aug 02 04:34:24.526 INFO running `"docker" "rm" "-f" "f197bd6c5ce4d23ce8e1da75631f7b879ace43f59faba3f892a547bc5c589f3f"`
Aug 02 04:34:24.721 INFO blam! f197bd6c5ce4d23ce8e1da75631f7b879ace43f59faba3f892a547bc5c589f3f