[ ghc-Bugs-1016120 ] Fails silently if preprocessor not found

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Bugs item #1016120, was opened at 2004-08-25 18:35
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Category: Compiler
Group: 6.2.1
Status: Open
Resolution: None
Priority: 5
Submitted By: Schoinobates Volans (schoinobates)
Assigned to: Nobody/Anonymous (nobody)
Summary: Fails silently if preprocessor not found

Initial Comment:
When using a package that asks ghc to run a
preprocessor on the source, if the execution of the
preprocessor fails (e.g. because the latter is not
installed on the system or not in the PATH), ghc fails
silently. It should write an error message to stderr,
something like "execution of preprocessor 'foo' failed:
No such file or directory".

I encountered this with Wash, version WashNGo-2.0.3:
http://www.informatik.uni-freiburg.de/~thiemann/haskell/WASH/

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