I think runhaskell reports that when the program has crashed violently with a segmentation violation. On Nov 16, 2005, at 1:54 AM, Donald Bruce Stewart wrote:

I've been getting this in lambdabot with waitForProcess since 6.4.1 (I think). Seems harmless though (I think). Try catching the exception.

Control.Exception.catch (waitForProcess pid) (\_ -> return ExitSuccess) -- so just fake success

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