Re: [Plplot-general] Resizing issues of plplot window using python and qt (segfaults)

[Peter H. <pet...@sy...>]

Hi Alan,


I have used the debian out of the box version 5.1.0. I will try to
reproduce (hopefully not though) the segfaults with the latest git
release. Maybe its already fixed with the plbuf changes ...


I will report the results then! 

Cheers,
Peter


> 
> 
> We take memory management errors (which often produce segfaults)
> seriously.  However, it may be a long process to sort out this issue,
> but to help get that debug process started, I and others do test our
> pyqt4 binding via examples/python/pyqt4_example.py (e.g., by using the
> cmake option -DBUILD_TEST=ON, and after cmake is completed running
> 
> make test_pyqt4_example
> 
> in the build tree or as part of some larger test such as
> 
> make test_interactive
> 
> in the build tree.
> 
> We run such tests routinely as part of due diligence leading up to
> releases, and so far nobody has reported segfaults with that example.
> Of course, that is a "for what it is worth" comment because memory
> management errors sometimes don't lead to segfaults or any other
> obvious symptom, and also because pyqt4_example.py is a simpler test
> for our pyqt4 binding than your test case.  Nevetheless, you should do
> that same test yourself just to make sure you can replicate our good
> test result for this case.
> 
> Your post caught my eye because you mentioned resizing.  That
> typically uses plbuf capabilities, and a number of bug fixes have just
> been completed for plbuf.  So just now for the git master tip version
> of PLplot I ran the test_pyqt4_example target above and did a lot of
> resizing of the resulting GUI without segfault (or other) issues, and
> you might want to try the same thing.
> 
> Also, I suggest you try that test and also your own example using the
> git master tip version of PLplot just in case the recent plbuf fixes
> have solved the segfault problem for you.
> 
> And more about that master tip version in my next post.
> 
> Alan
> __________________________
> Alan W. Irwin
> 
> Astronomical research affiliation with Department of Physics and Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
> 
> Programming affiliations with the FreeEOS equation-of-state
> implementation for stellar interiors (freeeos.sf.net); the Time
> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
> software package (plplot.sf.net); the libLASi project
> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
> and the Linux Brochure Project (lbproject.sf.net).
> __________________________
> 
> Linux-powered Science
> __________________________