topHandler drops useful exception info
Open
Cabal: other
type: bug
- Dominant language
- Haskell
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Description
With `topHandler`, I get:
```
TmpTest.hs: permissionDenied
```
Without it, I get a very nice error message:
```
TmpTest.hs: DeleteFile "C:\\msys64\\tmp\\tmp-11944\\foo": permission denied (The process cannot access the file because it is being used by another process.)
```
#823 is related but is a different, cosmetic problem which is not that important, so I filed a new bug. I plan on fixing this.
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