#559 intermittent GOP/mycanvas crasher bug

[Anonymous]

This patch causes pd and pd-extended to crash, when opened and closed a number of times. Resulting message in terminal is: segmentation fault. A canvas object inside an abstraction with "graph on parent", which in turn is inside an abstraction with "graph on parent".
The same result when replacing the canvas object with a graphical bang.
Tested on Ubuntu Lucid, without desktop effects.
No crash on Windows Vista.

[Nobody/Anonymous]

[Hans-Christoph Steiner]

On Windows 7 using Pd-extended 0.42.5-rc2 and on Mac OS X 10.5.8/Intel Ubuntu/Lucid using Pd-vanilla 0.42.5 and Pd-extended 0.42.5-rc2, this patch didn't crash Pd.

[ailo]

I added this bug. It crashes for me on Ubuntu Lucid amd64, and i had the same crash on Karmic intel 32.
You need to open/close the patch several times. The crash happens when closing the patch for nth time.

[Hans-Christoph Steiner]

ah yes, I see it. it happens between 3-5 cycles of opening and closing it to trigger the crash, but sometimes it doesn't crash after 20 cycles.

[Hans-Christoph Steiner]

I tried figuring it out, but no luck yet. I did find out that when it crashes, it first outputs this error message:

error: pd-canvas_abstractions.pd: couldn't unbind
... you might be able to track this down from the Find menu.