Bug in GHC 6.2.1

[Gregory Wright]

Hi,

Is this bug the same as the one I reported on 25 March (Nit with 6.2.1)?

The original report:

>
> Hi,
>
> I built 6.2.1 on Mac OS X 10.3.3 from source with OpenGL support.
>
> I built the Cube.hs demo program and it compiles and runs fine, but if 
> I
> terminate it with crtl-C instead of hitting "q" in the OpenGL window, 
> I get
> the error message
>
> > ./Cube
> ^CCube: internal error: unblockThread
>     Please report this as a bug to glasgow-haskell-bugs at haskell.org,
>     or http://www.sourceforge.net/projects/ghc/
>
> (Hitting "q" in the OpenGL display window causes graceful termination.)
>
> Perhaps the error message is simply overly enthusiastic. Or maybe there
> is something wrong.
>
> Best Wishes,
> Greg
>


Best,
Greg


On Apr 13, 2004, at 9:49 AM, Simon Marlow wrote:

>
>> This is the program:
>>
>> import Control.Concurrent
>>
>> main = do
>>   m <- newEmptyMVar
>>   forkIO $ do
>>     s <- getLine
>>     putMVar m s
>>   s <- takeMVar m
>>   putStrLn s
>>
>>> ghc --make Bug.hs                          [21:54]
>> Chasing modules from: Bug.hs
>> Compiling Main             ( Bug.hs, Bug.o )
>> Linking ...
>>> ./a.out                                    [21:57]
>> # Now hit Ctrl-C
>> a.out: internal error: main thread has been GC'd
>>     Please report this as a bug to glasgow-haskell-bugs at haskell.org,
>>     or http://www.sourceforge.net/projects/ghc/
>
> Thanks, that's a bug.  I've fixed it in CVS.
>
> As far as I can tell, only aborting a program with Ctrl-C should 
> trigger
> the bug.
>
> Cheers,
> 	Simon
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