2008/10/7 Johannes Waldmann
with 6.10, the following does not typecheck:
foo `Control.Exception.catch` \ _ -> return bar
Ambiguous type variable `e' in the constraint: `Control.Exception.Exception e'
catch \(e :: SomeException) -> ... This requires language ScopedTypeVariables (and perhaps PatternSignatures). Of cause, you should try to be more specific about which exceptions you want to catch as e.g., Ctrl-C and many other things are also reported as exceptions.
It is probably bad programming style anyway but what is the workaround? I found some references (in list emails) to catchAny, ignoreExceptions but these don't seem to have made it?
Best regards, J.W.
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