#911: Better information about the location of exceptions
--------------------------------+-------------------------------------------
Reporter: simonmar | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Runtime System | Version: 6.4.2
Severity: normal | Keywords:
Os: Unknown | Difficulty: Unknown
Architecture: Unknown |
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From Frederik Eaton, on glasgow-haskell-bugs:
I think it would be a good idea to print instructions for getting more
information when a program fails with a pattern match or other error.
Rather than
{{{
foo: Prelude.undefined
}}}
it should say
{{{
foo: Prelude.undefined
For information about the location of this error, recompile with "-prof
-auto-all" and run with "+RTS -xc -RTS"
}}}
Also, maybe these instructions aren't enough? When I do the above, it
just prints
{{{
<GHC.Err.CAF><GHC.Err.CAF><GHC.Err.CAF><GHC.Err.CAF>foo: Prelude.undefined
}}}
which isn't what I was looking for... Am I forgetting an option or
something?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/911>
GHC <http://www.haskell.org/ghc/>
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