[Haskell-cafe] SIGSEGV in yieldCapability ()

Simon Marlow marlowsd at gmail.com
Tue May 24 13:53:53 CEST 2011

On 23/05/2011 09:55, Erik Hesselink wrote:
> On Sun, May 22, 2011 at 15:03, Johannes Waldmann
> <waldmann at imn.htwk-leipzig.de>  wrote:
>>>   I think you should file a bug report with a test case
>>> on GHC.
>> I am willing to work on this, but I thought I'd go fishing for some
>> advice first. My program uses: forkIO, STM, and FFI.
> I've seen something like this, using only forkIO, so I'd start looking
> there. I was trying to create a reduced test case, but haven't
> reported a bug yet.
>> I think that "heap exhausted" sometimes gets reported
>> as "evacuate: strange closure",
>> (cf.  http://hackage.haskell.org/trac/ghc/ticket/5085 )
>> and yieldCapability() might be another instance.
> Thank you, we just had this message, and I had no idea what it was.

Please report all crashes like this as bugs:


In particular, the RTS should never trigger a crash in a heap exhausted 
situation - if some documentation somewhere gives the wrong impression 
about that, please let me know.

I will need a reproducible test case to track down the bug, though.


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