[PD] flext glibc double free or corruption

Thomas Grill gr at grrrr.org
Mon Nov 7 00:59:41 CET 2005

Hi Johannes,
thanks for your report.

I tried your patch (it's good to give the abs abstraction another name, 
since abs is an internal object), but everything works as expected both 
with Miller's PD and with devel_0_39. Not a single valgrind message is 
generated here (apart from a harmless one from inside pthreads).
It seems there's something strange with your system that is beyond my scope.
I'm curious about more observations though.

best greetings,

Johannes Burström wrote:
> Hi
> Thomas Grill wrote:
>> If you could use the debug version of pool (built with "flext/build.sh 
>> pd gcc build-debug-single") and run pd with valgrind, some helpful 
>> information could probably be gathered.
> I've tried to make an easy patch to provoke a segfault, and finally 
> found a good recipe... attached is "abs.pd" and "parent.pd". open parent 
> with abs in path, and remove one or two instances of abs, perhaps undo 
> once, and pd will eventually crash.
> I compiled a debug version of pool, and did the above with valgrind. 
> output is attached. it's the first time i've run valgrind, so i just ran 
> it without any special arguments.. hope it can be of some use.
> thanks,
> Johannes

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