Aug 01 19:29:40.837 INFO checking utf-8-0.7.2 against 1.27.2 for lazy_static-1
Aug 01 19:29:40.838 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:29:40.838 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:29:40.838 INFO running `"docker" "create" "-v" "/tmp/crater.zC0B2ZUz6eJ2:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2:/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 01 19:29:41.057 INFO blam! 966749ed420dd9d03d03954cb3804653d3a42523c4796b7f88390556d2286401
Aug 01 19:29:41.059 INFO running `"docker" "start" "-a" "966749ed420dd9d03d03954cb3804653d3a42523c4796b7f88390556d2286401"`
Aug 01 19:29:41.954 INFO kablam!     Checking utf-8 v0.7.2 (file:///source)
Aug 01 19:29:42.915 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:29:42.915 INFO kablam!  --> benches/from_utf8_lossy.rs:1:1
Aug 01 19:29:42.915 INFO kablam!   |
Aug 01 19:29:42.915 INFO kablam! 1 | #![feature(test)]
Aug 01 19:29:42.915 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 19:29:42.915 INFO kablam! 
Aug 01 19:29:42.916 INFO kablam! error: aborting due to previous error
Aug 01 19:29:42.916 INFO kablam! 
Aug 01 19:29:42.916 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:29:42.947 INFO kablam! error: Could not compile `utf-8`.
Aug 01 19:29:42.947 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 19:29:43.344 INFO kablam! error: build failed
Aug 01 19:29:43.346 INFO kablam! su: No module specific data is present
Aug 01 19:29:44.259 INFO running `"docker" "rm" "-f" "966749ed420dd9d03d03954cb3804653d3a42523c4796b7f88390556d2286401"`
Aug 01 19:29:44.393 INFO blam! 966749ed420dd9d03d03954cb3804653d3a42523c4796b7f88390556d2286401