Better information about the location of exceptions
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?
Trac metadata
Trac field | Value |
---|---|
Version | 6.4.2 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Runtime System |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | frederik@a5.repetae.net |
Operating system | Unknown |
Architecture | Unknown |