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When you have a function call and you try to take the head of the arguments list you may crash if the argument list is empty. The issue #250 boils down to just that. Instead of taking the head of the argument list, we wrap the correct type in a list and compare that with the argument list.
I am also adding an example that crashed before the change but correctly reports an error after the change. It is kind of silly so I am not adding it to the CI.