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[Octave-bug-tracker] [bug #45863] Octave crashes when clicking on polar


From: Michael Godfrey
Subject: [Octave-bug-tracker] [bug #45863] Octave crashes when clicking on polar plot using OpenGL
Date: Tue, 22 Sep 2015 10:59:54 +0000
User-agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2508.0 Safari/537.36

Follow-up Comment #6, bug #45863 (project octave):

For me, this (or a similar) problem only
occurs with qt. And, it typically requires
a number of mouse actions (click on plot, move, resize)
before the seg fault occurs.

This may be connected with the problem reported
in bug #45540. I think that Pantxo is working on this
and may decide to open a new bug report since there
has been some confusion over problems with OpenGL. There
seem to be several problems:

1. Use of gt or fltk. Most problems are specific to one
   or the other.
2. Just hovering over plot causes seg fault.
3. Clicking on plot while it is still being drawn.
4. Several clicks or other actions after plot has been
   drawn using qt.

By the way, when I just tried the case 3 above with qt
I got:

>> graphics_toolkit('qt')
>> plot(1:20000)
>> Mesa 10.6.3 implementation error: invalid target in
_swrast_choose_texture_sample_func
Please report at https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa
Mesa 10.6.3 implementation error: invalid target in
_swrast_choose_texture_sample_func
Please report at https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa
panic: Segmentation fault -- stopping myself...


The crash happened before, but did not produce this error
message from Mesa.




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