Ubuntu
pyqwt5 package

python-qwt5-qt4 segfaults immediately in saucy

Bug #1243102 reported by Olaf Lüke on 2013-10-22

This bug affects 5 people

	Status	Importance	Assigned to
pyqwt5 (Ubuntu)	Fix Released	Undecided	Unassigned
Saucy	Fix Released	Medium	Brian Murray
Trusty	Fix Released	Undecided	Unassigned

Bug Description

python-qwt5-qt4 segfaults directly after the first Qwt object is created.

Recreate with:

import PyQt4.Qwt5 as Qwt
k = Qwt.QwtKnob()

or run one of the example programs in /usr/share/doc/python-qwt5-doc/qt4examples

Backtrace:

Program received signal SIGSEGV, Segmentation fault.
0xb623805f in qpycore_get_lazy_attr () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
(gdb) bt
#0 0xb623805f in qpycore_get_lazy_attr () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#1 0xb7fc783d in add_lazy_attrs (td=0xb797b3e0) at /build/buildd/sip4-4.15.2/siplib/siplib.c:6678
#2 add_all_lazy_attrs (td=0xb797b3e0) at /build/buildd/sip4-4.15.2/siplib/siplib.c:6699
#3 0xb7fc7cac in sipSimpleWrapper_new (wt=0x853641c, args=0xb7d3602c, kwds=0x0) at /build/buildd/sip4-4.15.2/siplib/siplib.c:9388
#4 0x081413fe in type_call.25511 (type=0x853641c, args=0xb7d3602c, kwds=0x0) at ../Objects/typeobject.c:729
#5 0x080c1e45 in PyObject_Call (kw=0x0, arg=0xb7d3602c, func=0x853641c) at ../Objects/abstract.c:2529
#6 do_call (nk=0, na=<optimized out>, pp_stack=0xbfffee2c, func=0x853641c) at ../Python/ceval.c:4239
#7 call_function (oparg=<optimized out>, pp_stack=0xbfffee2c) at ../Python/ceval.c:4044
#8 PyEval_EvalFrameEx (f=f@entry=0x83adfac, throwflag=throwflag@entry=0) at ../Python/ceval.c:2666
#9 0x080c8702 in PyEval_EvalCodeEx (co=0xb7cc8a88, globals=0xb7d66714, locals=0xb7d66714, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3253
#10 0x081aed77 in PyEval_EvalCode (co=0xb7cc8a88, globals=0xb7d66714, locals=0xb7d66714) at ../Python/ceval.c:667
#11 0x080a9be7 in run_mod (mod=<optimized out>, filename=<optimized out>, globals=0xb7d66714, locals=0xb7d66714, flags=0xbffff01c, arena=0x836ff88) at ../Python/pythonrun.c:1365
#12 0x080aa4fd in PyRun_FileExFlags (fp=fp@entry=0x83745b8, filename=filename@entry=0xbffff32a "test.py", start=start@entry=257, globals=globals@entry=0xb7d66714, locals=locals@entry=0xb7d66714,
closeit=closeit@entry=1, flags=flags@entry=0xbffff01c) at ../Python/pythonrun.c:1351
#13 0x080aadc0 in PyRun_SimpleFileExFlags (fp=0x83745b8, filename=<optimized out>, closeit=1, flags=0xbffff01c) at ../Python/pythonrun.c:943
#14 0x080aaeb3 in PyRun_AnyFileExFlags (fp=fp@entry=0x83745b8, filename=<optimized out>, filename@entry=0xbffff32a "test.py", closeit=closeit@entry=1, flags=flags@entry=0xbffff01c)
at ../Python/pythonrun.c:747
#15 0x080abb1d in Py_Main (argc=argc@entry=2, argv=argv@entry=0xbffff154) at ../Modules/main.c:640
#16 0x080abbfc in main (argc=2, argv=0xbffff154) at ../Modules/python.c:23

olaf@pc:~$ lsb_release -rd
Description: Ubuntu 13.10
Release: 13.10

olaf@pc:~$ apt-cache policy python-qwt5-qt4
python-qwt5-qt4:
  Installed: 5.2.1~cvs20091107+dfsg-6+b3build2
  Candidate: 5.2.1~cvs20091107+dfsg-6+b3build2
  Version table:
*** 5.2.1~cvs20091107+dfsg-6+b3build2 0
        500 http://de.archive.ubuntu.com/ubuntu/ saucy/universe i386 Packages
        100 /var/lib/dpkg/status

Tags:

Related branches

lp:ubuntu/trusty-proposed/pyqwt5

lp:ubuntu/saucy-proposed/pyqwt5

Revision history for this message

Olaf Lüke (borg) wrote on 2013-10-22:

Additional infos:

I just tried the qwt5 examples with c++: They work. So the segfault must have to do with the Python bindings.

The two changes in saucy according to the changelog are:
* No change rebuild to get a higher version than the sip4 breaks
* No-change rebuild for sip-api dependency

The qpycore_get_lazy_attr() function that causes the segfault is called from within sip. So the problem might have to do with a failed rebuild a changed API of sip or similar.

Revision history for this message

Olaf Lüke (borg) wrote on 2013-10-22:

Alright, i rebuild and reinstalled the python-qwt5-qt4 package:

apt-get source python-qwt5-qt4
mk-build-deps -i -r python-qwt5-qt4
fakeroot debian/rules binary
dpkg -i ../python-qwt5-qt4_5.2.1~cvs20091107+dfsg-6+b3build2_i386.deb

Now the segfault is gone.

Could someone please rebuild and reupload the package?

Thank you!

Dimitri John Ledkov (xnox) on 2013-10-24

Changed in pyqwt5 (Ubuntu):
assignee:	nobody → Scott Kitterman (kitterman)

Scott Kitterman (kitterman) on 2013-10-24

Changed in pyqwt5 (Ubuntu Trusty):
assignee:	Scott Kitterman (kitterman) → nobody

Revision history for this message

Olaf Lüke (borg) wrote on 2013-10-31:

debdiff Edit (463 bytes, text/plain)

Since i currently aren't able to find a sponsor that rebuilds the package i made a ppa with a fixed package for the meantime: https://launchpad.net/~borg/+archive/ppa/+packages

I also attached a debdiff.

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-11-01:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in pyqwt5 (Ubuntu Saucy):
status:	New → Confirmed
Changed in pyqwt5 (Ubuntu):
status:	New → Confirmed

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-11-13:

This bug was fixed in the package pyqwt5 - 5.2.1~cvs20091107+dfsg-6+b3build3

---------------
pyqwt5 (5.2.1~cvs20091107+dfsg-6+b3build3) trusty; urgency=low

* No changes, rebuild for sip-api dependency (LP: #1243102)
-- Olaf Lueke <email address hidden> Thu, 31 Oct 2013 12:31:25 +0100

Changed in pyqwt5 (Ubuntu Trusty):
status:	Confirmed → Fix Released

Revision history for this message

Brian Murray (brian-murray) wrote on 2013-11-15:

I've uploaded this to saucy thanks!

Changed in pyqwt5 (Ubuntu Saucy):
assignee:	nobody → Brian Murray (brian-murray)
status:	Confirmed → In Progress
importance:	Undecided → Medium

Revision history for this message

Stéphane Graber (stgraber) wrote on 2013-11-18: Please test proposed package

Hello Olaf, or anyone else affected,

Accepted pyqwt5 into saucy-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/pyqwt5/5.2.1~cvs20091107+dfsg-6+b3build2.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in pyqwt5 (Ubuntu Saucy):
status:	In Progress → Fix Committed
tags:	added: verification-needed

Revision history for this message

Robert Proepper (robert-proepper) wrote on 2013-11-19:

Tested version 5.2.1~cvs20091107+dfsg-6+b3build2.1 from saucy-proposed, fixes the error for me.

tags:

added: verification-done
removed: verification-needed

Revision history for this message

Olaf Lüke (borg) wrote on 2013-11-19:

#10

Version 5.2.1~cvs20091107+dfsg-6+b3build2.1 from saucy-proposed works fine for me too. Thanks!

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-11-25:

#11

This bug was fixed in the package pyqwt5 - 5.2.1~cvs20091107+dfsg-6+b3build2.1

---------------
pyqwt5 (5.2.1~cvs20091107+dfsg-6+b3build2.1) saucy; urgency=low

* No changes, rebuild for sip-api dependency (LP: #1243102)
-- Olaf Lueke <email address hidden> Fri, 15 Nov 2013 15:38:56 -0800

Changed in pyqwt5 (Ubuntu Saucy):
status:	Fix Committed → Fix Released

Revision history for this message

Brian Murray (brian-murray) wrote on 2013-11-25: Update Released

#12

The verification of the Stable Release Update for pyqwt5 has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.