[PD-dev] message crash when using menuclose on patch

Antoine Rousseau antoine at metalu.net
Wed Sep 27 16:51:16 CEST 2017

I just found out that if 2 instances of the same file are opened, sending a
"pd-PatchName.pd menuclose" crashes Pd. I don't know if it is related to
your problem.

If only one instance is opened, crash happens pretty rarely, but it

see attached test.

Antoine Rousseau
  http://www.metalu.net <http://metalu.net> __

2017-09-27 16:17 GMT+02:00 Antoine Rousseau <antoine at metalu.net>:

> Instead of closing it from the main patch, did you try asking the song
> patch to close itself after a small delay (10ms)? And making sure that no
> communication occurs between them at that moment.
> Other test: dynamic patching in a subpatch of the main patch (maybe
> worse...)
> Of course a bug fix would be better...
> Antoine Rousseau
>   http://www.metalu.net <http://metalu.net> __ htt
> p://www.metaluachahuter.com/
> <http://www.metaluachahuter.com/compagnies/al1-ant1/>
> 2017-09-27 13:02 GMT+02:00 Dan Wilcox <danomatika at gmail.com>:
>> I've been trying to track down a bug which crashes pd when switching song
>> patches in my performance system. I first recall seeing this with 0.47-1
>> and never had a problem before with Pd-extended. It's a showstopper and
>> keeping me from using PdParty for what I built it for.
>> Basically, I have a main performance patch for audio io, playlist
>> management, transport control, and OSC communication. Songs are separate
>> patches that are opened and closed when running through the playlist using
>> the "pd open $file $dir" and "pd-PatchName.pd menu close 1" messages. The
>> song patches communicate with the performance patch via send and receive
>> objects.
>> The problem comes where sometimes closing a patch leads to a crash. I've
>> tested numerous approaches and opening is not a problem, only the close
>> message. Digging through with the debugger shows the crash generally
>> happens in pd_typedmess and it seems as though messages being sent to the
>> global send objects between the patches are being processed in a patch even
>> after it was just closed which ends in a BAD_ACCESS. At least that's as far
>> as I've been able to figure things out. I can provide backtraces, etc.
>> I'm hoping to figure this out as I've been wanting to develop for and use
>> my newer system but this is really killing any chance so far.
>> --------
>> Dan Wilcox
>> @danomatika <http://twitter.com/danomatika>
>> danomatika.com
>> robotcowboy.com
>> _______________________________________________
>> Pd-dev mailing list
>> Pd-dev at lists.iem.at
>> https://lists.puredata.info/listinfo/pd-dev
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