Simon Marlow wrote:
Really hClose shouldn't complain about a finalized handle, I'll see if I can fix that.
That sounds like a work-around to me, not a fix, because it would not fix more complicated exception handlers.
I don't think there's a problem with more complicated exception handlers. The fix is to make the finalized Handle look like a closed Handle; it's a fix to the finalizer, not the exception handler, so it's not a workaround for this one particular symptom.
Given the documentation of bracket, I would expect the following to write to the file. main = bracket (openFile "output" WriteMode) (\handle -> do hPutStr handle "I want this to be written in any case" hClose handle) blackhole blackhole = blackhole But currently, hPutStr complains about a finalized handle, and with your fix, it would complain about a closed handle, which is hardly better. Tillmann