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Re: [Sc-devel] n_free bug

hmm, maybe you are right regarding OffsetOut. I can spot the difference here (see how it crashes also with n_free):

s.waitForBoot({ fork {
	SynthDef(\test, {
		var z;
		z = SinOsc.ar;
		Offset.ar( 0, z );	// no crash with Out instead
	}).send( s );
	s.sendBundle( nil,
		[ "/g_new", 1007, 0, 0 ],
		[ "/s_new", "test", 1011, 1, 1007 ],
		[ "/n_run", 1011, 0 ]);
	s.sendMsg( "/n_free", 1007 );

... and also i realized i was still using OffsetOut in Eisenkraut (since a while ago i thought that it had any precision advantage over Out, but i never really understood what OffsetOut was doing and why it would be more sample accurate than Out when not using bundle times). So i replaced all OffsetOut with Out in Eisenkraut, and some mysterious scsynth crash bugs disappeared straight away...

ciao, -sciss-

Am 04.12.2007 um 03:53 schrieb Josh Parmenter:

I noticed Sciss's n_free bug in the bug tracker, and noticed in the console output that OffsetOut's Dtor was involved. I tried a couple of test cases with Dtor UGens, and they all crashed, but the following example didn't:


SynthDef(\test, {
	Out.ar(0, SinOsc.ar(440, 0, 0.1))
// now either of these:

s.sendBundle( nil,
[ "/g_new", 1007, 0, 0 ],
[ "/s_new", "test", 1011, 1, 1007 ],
[ "/n_run", 1011, 0 ] // REQUIRED TO PRODUCE THE CRASH
s.sendMsg( "/g_deepFree", 1007 ); // Doesn't BOOOM!

Perhaps the bug has to do with the deepFree doing something wrong with Dtors? I don't really know where to look for this... I'll poke around some, but in case this rings a bell for anyone, I thought I would post it!

/* Joshua D. Parmenter

“Every composer – at all times and in all cases – gives his own interpretation of how modern society is structured: whether actively or passively, consciously or unconsciously, he makes choices in this regard. He may be conservative or he may subject himself to continual renewal; or he may strive for a revolutionary, historical or social palingenesis." - Luigi Nono

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