I'm not quite sure when it happened but error messages in the Nov 2003 release
are much less informative than they used to be. In particular, I was hoping
to see a line number and filename in this message.
Program error: pattern match failure
In contrast, ghci reports:
*** Exception: gen_effect.hs:502: Non-exhaustive patterns in function
writeResult
I'm guessing that what's happened is we're using non-deterministic exceptions
in more of Hugs and the error object created in response to a pattern match
failure doesn't record the line number, etc.
--
Alastair Reid haskell-consulting.com
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