PySide Bugzilla Closed for New Bugs

PySide is now a Qt Add-on and uses the Qt Project's JIRA Bug Tracker instead of this Bugzilla instance. This Bugzilla is left for reference purposes.

First Last Prev Next    This bug is not in your last search results.
Bug 378 - Segmentation fault in PySide::signalUpdateSource if you set an attribute before calling super __init__()
: Segmentation fault in PySide::signalUpdateSource if you set an attribute befo...
Status: CLOSED FIXED
Product: PySide
Classification: Unclassified
Component: QtNetwork
: 0.4.1
: PC Linux
: P3 normal
Assigned To: renato filho
:
:
:
  Show dependency tree / graph
 
Reported: 2010-09-22 11:52 EEST by David Bronke
Modified: 2010-10-13 13:48 EEST (History)
10 users (show)

See Also:

Attachments
The project which exhibits the segfault. (158.74 KB, application/octet-stream)
2010-09-22 11:52 EEST, David Bronke 		Details
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description David Bronke 2010-09-22 11:52:26 EEST 
Created attachment 94 [details]
The project which exhibits the segfault.

When calling QtNetwork.QNetworkCookieJar.__init__(self) in my subclass of
QtNetwork.QNetworkCookieJar, we experience the following segfault:

(gdb) r
Starting program: /usr/bin/python coconut.py
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffe47bb710 (LWP 23614)]
[New Thread 0x7fffe3ea2710 (LWP 23615)]
Making new shiny NetworkCookieJar.
BLEH

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff644a092 in PySide::signalUpdateSource(_object*) () from
/usr/lib/libpyside.so.0.4
(gdb) bt
#0  0x00007ffff644a092 in PySide::signalUpdateSource(_object*) () from
/usr/lib/libpyside.so.0.4
#1  0x00007fffee601030 in ?? () from
/usr/lib/python2.6/site-packages/PySide/QtNetwork.so
#2  0x00007ffff7ad219c in wrap_init () from /usr/lib/libpython2.6.so.1.0
#3  0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#4  0x00007ffff7b0fb43 in PyEval_CallObjectWithKeywords () from
/usr/lib/libpython2.6.so.1.0
#5  0x00007ffff7a9b069 in wrapperdescr_call () from
/usr/lib/libpython2.6.so.1.0
#6  0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#7  0x00007ffff7b152ce in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#8  0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#9  0x00007ffff7aaa9cf in function_call () from /usr/lib/libpython2.6.so.1.0
#10 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#11 0x00007ffff7a9644f in instancemethod_call () from
/usr/lib/libpython2.6.so.1.0
#12 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#13 0x00007ffff7ad571e in slot_tp_init () from /usr/lib/libpython2.6.so.1.0
#14 0x00007ffff7ad4338 in type_call () from /usr/lib/libpython2.6.so.1.0
#15 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#16 0x00007ffff7b152ce in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#17 0x00007ffff7b16140 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#18 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#19 0x00007ffff7aaa9cf in function_call () from /usr/lib/libpython2.6.so.1.0
#20 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#21 0x00007ffff7a9644f in instancemethod_call () from
/usr/lib/libpython2.6.so.1.0
#22 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#23 0x00007ffff7ad571e in slot_tp_init () from /usr/lib/libpython2.6.so.1.0
#24 0x00007ffff7ad4338 in type_call () from /usr/lib/libpython2.6.so.1.0
#25 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#26 0x00007ffff7b152ce in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#27 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#28 0x00007ffff7b15af5 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#29 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#30 0x00007ffff7aaaacb in function_call () from /usr/lib/libpython2.6.so.1.0
#31 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#32 0x00007ffff7b14514 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#33 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#34 0x00007ffff7aaa9cf in function_call () from /usr/lib/libpython2.6.so.1.0
#35 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#36 0x00007ffff7a9644f in instancemethod_call () from
/usr/lib/libpython2.6.so.1.0
#37 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#38 0x00007ffff7ad5ae4 in slot_tp_call () from /usr/lib/libpython2.6.so.1.0
#39 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#40 0x00007ffff7b152ce in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#41 0x00007ffff7b16140 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#42 0x00007ffff7b16140 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#43 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#44 0x00007ffff7aaa9cf in function_call () from /usr/lib/libpython2.6.so.1.0
#45 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#46 0x00007ffff7a9644f in instancemethod_call () from
/usr/lib/libpython2.6.so.1.0
#47 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#48 0x00007ffff7ad571e in slot_tp_init () from /usr/lib/libpython2.6.so.1.0
#49 0x00007ffff7ad4338 in type_call () from /usr/lib/libpython2.6.so.1.0
#50 0x00007ffff7a83893 in PyObject_Call () from /usr/lib/libpython2.6.so.1.0
#51 0x00007ffff7b152ce in PyEval_EvalFrameEx () from
/usr/lib/libpython2.6.so.1.0
#52 0x00007ffff7b17570 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.6.so.1.0
#53 0x00007ffff7b17642 in PyEval_EvalCode () from /usr/lib/libpython2.6.so.1.0
#54 0x00007ffff7b3187c in run_mod () from /usr/lib/libpython2.6.so.1.0
#55 0x00007ffff7b31950 in PyRun_FileExFlags () from
/usr/lib/libpython2.6.so.1.0
#56 0x00007ffff7b32dfc in PyRun_SimpleFileExFlags () from
/usr/lib/libpython2.6.so.1.0
#57 0x00007ffff7b3f25d in Py_Main () from /usr/lib/libpython2.6.so.1.0
#58 0x00007ffff74e5c4d in __libc_start_main () from /lib/libc.so.6
#59 0x0000000000400609 in _start ()
(gdb)


Reproduction:

I was unable to generate a test case that exhibited the same problem; instead,
I have attached a tarball of my project. The error can be reproduced by running
coconut.py with PySide 0.4.1 installed.

The crash happens on line 25 of networkcookiejar.py.

OS: Arch Linux
Kernel: Linux 2.6.34-ARCH
Qt version: 4.6.3
PySide version: 0.4.1
Comment 1 Marcelo Lira 2010-09-24 16:05:20 EEST 
Fixed in commit PySide/dedc78b3.
Comment 2 Dan Halbert 2010-09-30 17:41:29 EEST 
Just for posterity, I encountered this bug too when upgrading from 0.4.0 to
0.4.1, and then discovered it was fixed. It is due to setting an attribute
before calling super(SomeSubclass, self).__init__(...). Here is the full commit
info:
http://qt.gitorious.org/pyside/pyside/commit/dedc78b3fef25e04cf436ca462714ad8dc0329cd.

I have changed the bug title to more accurately reflect the error.
Comment 3 renato filho 2010-10-13 13:48:57 EEST 
released on PySide 0.4.2
First Last Prev Next    This bug is not in your last search results.