Aug 02 04:34:10.978 INFO checking md4-0.7.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 04:34:10.978 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:34:10.978 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:34:10.978 INFO running `"docker" "create" "-v" "/tmp/crater.v6tNOBpcsh0X:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-4/1.27.2+tmplazy:/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 04:34:11.278 INFO blam! 8cf3ebaa540a1d31d348134faa3593044ead8f95d05178b0d874c4d88e7704dc
Aug 02 04:34:11.281 INFO running `"docker" "start" "-a" "8cf3ebaa540a1d31d348134faa3593044ead8f95d05178b0d874c4d88e7704dc"`
Aug 02 04:34:12.591 INFO kablam!     Checking md4 v0.7.0 (file:///source)
Aug 02 04:34:14.983 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:34:14.983 INFO kablam!  --> benches/lib.rs:2:1
Aug 02 04:34:14.983 INFO kablam!   |
Aug 02 04:34:14.983 INFO kablam! 2 | #![feature(test)]
Aug 02 04:34:14.983 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:34:14.992 INFO kablam! 
Aug 02 04:34:14.993 INFO kablam! error: aborting due to previous error
Aug 02 04:34:14.993 INFO kablam! 
Aug 02 04:34:14.993 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:34:15.009 INFO kablam! error: Could not compile `md4`.
Aug 02 04:34:15.010 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 04:34:15.494 INFO kablam! error: build failed
Aug 02 04:34:15.495 INFO kablam! su: No module specific data is present
Aug 02 04:34:16.084 INFO running `"docker" "rm" "-f" "8cf3ebaa540a1d31d348134faa3593044ead8f95d05178b0d874c4d88e7704dc"`
Aug 02 04:34:16.238 INFO blam! 8cf3ebaa540a1d31d348134faa3593044ead8f95d05178b0d874c4d88e7704dc