Some of the installed packages: https://github.com/Codewars/codewars-runner-cli/blob/master/docker/haskell.docker#L32-L35

https://github.com/Codewars/codewars-runner-cli/blob/master/documentation/environments/haskell.md sais 1.10.0

Are these issues still happening for you? We recently rolled out an updated architecture for running code that was around the time you logged this issue.

Hey, sorry for the late reply.

1. Not sure I agree with this one. fn should be an unambiguous identifier, and is not specifically reserved by the spec.
2. My solution already coverd this, but I have added a test to enforce it.
3. Should already be covered by existing tests, since fn is not defined in the arguments list.
4. Should be OK per the same rational as 1
5. My solution did not cover this case. I have fixed my solution and added a test case to cover it.

Thanks for the feedback! If you would like to make a detailed case for 1 and/or 4, I'll gladly consider it.

You are right. It was actually expecting Normal a because I didn't check if we reached the end of the input. Fixed now.