Fernando Perez wrote: > Hi all, > > > I'm getting: > > planck[examples]> python pylab_segfault.py > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > > > with this trivial code > > planck[examples]> cat pylab_segfault.py > import sys > import numpy as N > import pylab as P > > print "Numpy version:",N.__version__ > sys.stdout.flush() > > P.imshow(N.ones((4,4),dtype=N.uint8)) > P.show() > > # EOF
I have fixed this in two ways: by raising an exception in _image.cpp if the input to frombyte lacks 3 dimensions--this prevents the segfault--and by checking uint8 arrays for 3 dimensions in image.py before sending them to frombyte in the first place. The problem cropped up recently because of another change I made. cm.ScalarMappable.set_array had been making all float arrays float32, and all int arrays int16. This was causing problems with int32 arrays, of course, and I could not figure out any reason why it was needed, so I eliminated it. (I think I put that conversion in in the first place a long time ago; presumably I had a reason, and I hope I am correct that if it ever was necessary, it no longer is. The backend_driver tests are happy with the present state of affairs.) Eric > > Is anyone else seeing this? My matplotlib build is SVN: > > planck[scipy]> svn info matplotlib/ > Path: matplotlib > URL: https://svn.sourceforge.net/svnroot/matplotlib/trunk/matplotlib > Repository Root: https://svn.sourceforge.net/svnroot/matplotlib > Repository UUID: f61c4167-ca0d-0410-bb4a-bb21726e55ed > Revision: 3141 > Node Kind: directory > Schedule: normal > Last Changed Author: efiring > Last Changed Rev: 3141 > Last Changed Date: 2007-04-01 18:19:08 -0600 (Sun, 01 Apr 2007) > Properties Last Updated: 2006-07-08 22:39:32 -0600 (Sat, 08 Jul 2006) > > > And I get the above error with all GUI backends I've tested so far > (Tk, GTK, Qt and WX). > > > planck[examples]> python pylab_segfault.py -dWXAgg > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dTkAgg > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dQtAgg > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dGTKAgg > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dGTK > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dQt > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > planck[examples]> python pylab_segfault.py -dTk > Numpy version: 1.0.3.dev3651 > Segmentation fault (core dumped) > > > The TkAgg and the GTKAgg get as far as making the pylab window, but > then they crash. > > I should add that this same example ran fine for me about a week ago; > I can try to track down the exact versions of numpy and matplotlib I > was using at the time, but if someone has a fix for this, it would be > enormously appreciated. > > Cheers, > > f > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Matplotlib-devel mailing list > Matplotlib-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
