Aug 02 04:10:19.968 INFO checking morphism-0.4.1 against 1.27.2 for lazy_static-1
Aug 02 04:10:19.968 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:10:19.968 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:10:19.968 INFO running `"docker" "create" "-v" "/tmp/crater.IZUy60eodq6R:/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 04:10:20.195 INFO blam! 1807318d8e71c5615a361b8605ddf065b3a5a16acba77d9af9599bf1e1f4c7e6
Aug 02 04:10:20.197 INFO running `"docker" "start" "-a" "1807318d8e71c5615a361b8605ddf065b3a5a16acba77d9af9599bf1e1f4c7e6"`
Aug 02 04:10:21.089 INFO kablam!     Checking morphism v0.4.1 (file:///source)
Aug 02 04:10:22.685 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:10:22.685 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 04:10:22.685 INFO kablam!   |
Aug 02 04:10:22.685 INFO kablam! 1 | #![feature(test)]
Aug 02 04:10:22.685 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:10:22.685 INFO kablam! 
Aug 02 04:10:22.686 INFO kablam! error: aborting due to previous error
Aug 02 04:10:22.686 INFO kablam! 
Aug 02 04:10:22.686 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:10:22.692 INFO kablam! error: Could not compile `morphism`.
Aug 02 04:10:22.693 INFO kablam! 
Aug 02 04:10:22.693 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 04:10:22.694 INFO kablam! su: No module specific data is present
Aug 02 04:10:23.330 INFO running `"docker" "rm" "-f" "1807318d8e71c5615a361b8605ddf065b3a5a16acba77d9af9599bf1e1f4c7e6"`
Aug 02 04:10:23.446 INFO blam! 1807318d8e71c5615a361b8605ddf065b3a5a16acba77d9af9599bf1e1f4c7e6