Aug 02 12:23:13.379 INFO checking coroutine-0.8.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 12:23:13.379 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:23:13.379 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:23:13.379 INFO running `"docker" "create" "-v" "/tmp/crater.yvCrnGTI6H9n:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+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 12:23:13.614 INFO blam! fc72eceae2923ab69d352e2a6afa55815e1db694bc61f8d7a02f7b5d74d3491a
Aug 02 12:23:13.616 INFO running `"docker" "start" "-a" "fc72eceae2923ab69d352e2a6afa55815e1db694bc61f8d7a02f7b5d74d3491a"`
Aug 02 12:23:14.697 INFO kablam!     Checking coroutine v0.8.0 (file:///source)
Aug 02 12:23:15.673 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:23:15.673 INFO kablam!   --> src/lib.rs:25:1
Aug 02 12:23:15.673 INFO kablam!    |
Aug 02 12:23:15.673 INFO kablam! 25 | #![feature(fnbox)]
Aug 02 12:23:15.673 INFO kablam!    | ^^^^^^^^^^^^^^^^^^
Aug 02 12:23:15.673 INFO kablam! 
Aug 02 12:23:15.677 INFO kablam! error: aborting due to previous error
Aug 02 12:23:15.677 INFO kablam! 
Aug 02 12:23:15.677 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:23:15.689 INFO kablam! error: Could not compile `coroutine`.
Aug 02 12:23:15.690 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:23:15.873 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:23:15.873 INFO kablam!   --> src/lib.rs:25:1
Aug 02 12:23:15.873 INFO kablam!    |
Aug 02 12:23:15.873 INFO kablam! 25 | #![feature(fnbox)]
Aug 02 12:23:15.873 INFO kablam!    | ^^^^^^^^^^^^^^^^^^
Aug 02 12:23:15.873 INFO kablam! 
Aug 02 12:23:15.874 INFO kablam! error: aborting due to previous error
Aug 02 12:23:15.874 INFO kablam! 
Aug 02 12:23:15.874 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:23:15.883 INFO kablam! error: Could not compile `coroutine`.
Aug 02 12:23:15.883 INFO kablam! 
Aug 02 12:23:15.883 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 12:23:15.885 INFO kablam! su: No module specific data is present
Aug 02 12:23:16.606 INFO running `"docker" "rm" "-f" "fc72eceae2923ab69d352e2a6afa55815e1db694bc61f8d7a02f7b5d74d3491a"`
Aug 02 12:23:16.758 INFO blam! fc72eceae2923ab69d352e2a6afa55815e1db694bc61f8d7a02f7b5d74d3491a