[Bug 1249571] Re: Segmentation fault on Ubuntu 13.10 when using guiqwt
*** This bug is a duplicate of bug 1243102 *** https://bugs.launchpad.net/bugs/1243102 ** This bug has been marked a duplicate of bug 1243102 python-qwt5-qt4 segfaults immediately in saucy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1249571 Title: Segmentation fault on Ubuntu 13.10 when using guiqwt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1249571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1249571] Re: Segmentation fault on Ubuntu 13.10 when using guiqwt
Hi Scott, I just find a fixed package here: https://bugs.launchpad.net/ubuntu/+source/pyqwt5/+bug/1243102 that solves my problem! It seems it's a problem with python-qwt5-qt4 rather than python-qt4. At least my guiqwt package works fine now. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1249571 Title: Segmentation fault on Ubuntu 13.10 when using guiqwt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1249571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1249571] Re: Segmentation fault on Ubuntu 13.10 when using guiqwt
@Scott
Thanks for your reply!
Since python-guiqwt is almost a pure python package. I don't think a rebuilding
will work. I had tried it and still got that segfault.
If you step into the code when you plot, you will find that the script stucks
there at this line:
self.emit(SIG_PLOT_LABELS_CHANGED, self) in baseplot.py (in python-guiqwt
directory). self here is a BasePlot class inherited from QwtPlot. And QwtPlot
is imported as this : from PyQt4.Qwt5 import QwtPlot. I also tried to rebuild
python-qwt5-qt4. But segfault again...
The signal SIG_PLOT_LABELS_CHANGED here is import from signal.py (also
in python-guiqwt directory): SIG_PLOT_LABELS_CHANGED =
SIGNAL('plot_labels_changed(PyQt_PyObject)').
The SIGNAL here is import via this: from guidata.qt.QtCore import SIGNAL. Here
the python-guidata is also a pure python package, in which there exist a script
QtCore.py with the following lines that might be related:
from PyQt4.QtCore import *
from PyQt4.QtCore import pyqtSignal as Signal
So that's why I think it can be a upstream problem with pyqt4...
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Title:
Segmentation fault on Ubuntu 13.10 when using guiqwt
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Re: [Bug 1249571] Re: Segmentation fault on Ubuntu 13.10 when using guiqwt
OK. Thanks for the analysis. If you can extract a reduced test case that demonstrates the problem, I'll send it upstream to see about a fix. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to python-qt4 in Ubuntu. https://bugs.launchpad.net/bugs/1249571 Title: Segmentation fault on Ubuntu 13.10 when using guiqwt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1249571/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 1249571] Re: Segmentation fault on Ubuntu 13.10 when using guiqwt
Hi Scott, Thanks again for your quick reply! Here I can give a short test script to reproduce this problem (as in attachment). It's basically a test case provided in guiqwt.tests (histogram.py). During debugging, it will stucks at line 12: win = CurveDialog(edit=False, toolbar=True, wintitle=Histogram test) Then you trace into it to plot.py, curve.py and then baseplot.py. Finally you will be here in baseplot.py: self.emit(SIG_PLOT_LABELS_CHANGED, self) in function: def update_axis_style(self, axis_id) Package: python-qt4 (4.10.3-1ubuntu1) Package: python-sip (4.15.2-1ubuntu1) reverting to python-qt4 (4.10-0ubuntu3) ) and python-sip (4.14.5-0ubuntu1) then everything works fine. ** Attachment added: test_guiqwt.py https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1249571/+attachment/3903922/+files/test_guiqwt.py -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1249571 Title: Segmentation fault on Ubuntu 13.10 when using guiqwt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1249571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
