Hi, > I am trying to catch an "thread blocked on MVar indefinitely exception." Of > course I can use ::SomeException as explained in http://hackage.haskell.org/ > packages/archive/base/latest/doc/html/Control-Exception.html#g:3 but there > is no explanation as to how to find the more case specific exceptions. > http://hackage.haskell.org/packages/archive/base/latest/doc/html/Control- > Concurrent-MVar.html#t:MVar does not discuss exceptions at all! Indeed, I > don't know of any haddock pages that include descriptions of exception types > :( :O
In this particular case it's easy: http://hackage.haskell.org/packages/archive/base/4.6.0.0/doc/html/Control-Exception.html#t:BlockedIndefinitelyOnMVar But in general, figuring out the exception type is not straight forward. Personally, I think an uncaught exception should print the type of that exception (e.g. use a derived show instance). But most of them have a show instance that is useful for end-users. The upcoming 1.4.0 release of Hspec will print the type of uncaught exceptions in test cases. So if you are into BDD/TDD that might be useful;) Cheers, Simon _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
