rutsky/class_name_collision.py

## class_name_collision.py
"""
If class is named as Qt class, sometimes PyQt machinery
leads to uncaught Python exception inside sipQWidget::qt_metacast,
which leads to failed Python assertion if Python is build in debug
mode.

$ ./python class_name_collision.py
python: ../Objects/abstract.c:2050: PyObject_Call: Assertion `(result != ((void *)0) && !PyErr_Occurred()) || (result == ((void *)0) && PyErr_Occurred())' failed.
Aborted (core dumped)
$ gdb --args ./python class_name_collision.py
GNU gdb (Ubuntu 7.9-1ubuntu1) 7.9
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./python...done.
(gdb) r
Starting program: /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/bin/python class_name_collision.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
python: ../Objects/abstract.c:2050: PyObject_Call: Assertion `(result != ((void *)0) && !PyErr_Occurred()) || (result == ((void *)0) && PyErr_Occurred())' failed.
[New Thread 0x7fffdfa3f700 (LWP 22088)]
[New Thread 0x7fffe0483700 (LWP 22087)]
[New Thread 0x7fffea8b1700 (LWP 22086)]

Program received signal SIGABRT, Aborted.
0x00007ffff6ad5cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff6ad5cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff6ad90d8 in __GI_abort () at abort.c:89
#2  0x00007ffff6aceb86 in __assert_fail_base (fmt=0x7ffff6c1f830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
    assertion=assertion@entry=0x704ca8 "(result != ((void *)0) && !PyErr_Occurred()) || (result == ((void *)0) && PyErr_Occurred())", file=file@entry=0x704332 "../Objects/abstract.c", line=line@entry=2050,
    function=function@entry=0x704f46 <__PRETTY_FUNCTION__.11058> "PyObject_Call") at assert.c:92
#3  0x00007ffff6acec32 in __GI___assert_fail (assertion=0x704ca8 "(result != ((void *)0) && !PyErr_Occurred()) || (result == ((void *)0) && PyErr_Occurred())", file=0x704332 "../Objects/abstract.c",
    line=2050, function=0x704f46 <__PRETTY_FUNCTION__.11058> "PyObject_Call") at assert.c:101
#4  0x00000000004679a0 in PyObject_Call (func=<built-in method __instancecheck__ of type object at remote 0x7fffed02fa00>, arg=(<sip.wrappertype at remote 0x7fffed24fb40>,), kw=0x0)
    at ../Objects/abstract.c:2049
#5  0x0000000000468bf0 in PyObject_CallFunctionObjArgs (callable=<built-in method __instancecheck__ of type object at remote 0x7fffed02fa00>) at ../Objects/abstract.c:2332
#6  0x00000000004694f2 in PyObject_IsInstance (inst=<sip.wrappertype at remote 0x7fffed24fb40>, cls=<type at remote 0x7fffed02fa00>) at ../Objects/abstract.c:2522
#7  0x00007fffecd3fb70 in qpycore_qobject_qt_metacast (pySelf=0x7fffec4af718, base=0x7ffff61c2480 <sipTypeDef_QtWidgets_QWidget>, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter",
    sipCpp=0x7fffffff9f88) at ../qpy/QtCore/qpycore_qobject_helpers.cpp:238
#8  0x00007ffff5e34945 in sipQWidget::qt_metacast (this=0xd18020, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter") at sipQtWidgetspart0.cpp:328332
#9  0x00007fffec76ef9c in QObject::inherits (this=0xd18020, classname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter") at /home/bob/Qt/5.5/gcc_64/include/QtCore/qobject.h:422
#10 0x00007fffec5f6d03 in sipSubClass_QGuiApplication (sipCppRet=0x7fffffffa028) at /mnt/data/bob/qt/PyQt-gpl-5.5.1/sip/QtGui/qguiapplication.sip:137
#11 0x00007fffed035a2c in ?? () from /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/lib/python3.4/site-packages/sip.so
#12 0x00007fffed0421db in ?? () from /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/lib/python3.4/site-packages/sip.so
#13 0x00007ffff5dfce6d in meth_QLayout_parentWidget (sipSelf=<QVBoxLayout at remote 0x7fffec4af7d8>, sipArgs=()) at sipQtWidgetspart0.cpp:302366
#14 0x00000000004c9c0b in PyCFunction_Call (func=<built-in method parentWidget of QVBoxLayout object at remote 0x7fffec4af7d8>, arg=(), kw=0x0) at ../Objects/methodobject.c:93
#15 0x00000000005be480 in call_function (pp_stack=0x7fffffffa5a0, oparg=0) at ../Python/ceval.c:4237
Python Exception <class 'RuntimeError'> Type does not have a target.:
#16 0x00000000005b689e in PyEval_EvalFrameEx (f=, throwflag=0) at ../Python/ceval.c:2838
Python Exception <class 'RuntimeError'> Type does not have a target.:
#17 0x00000000005bbae0 in PyEval_EvalCodeEx (_co=<code at remote 0x7ffff7e47a00>, globals=, locals=0x0, args=0x7ffff61ea150, argcount=1, kws=0x0, kwcount=0, defs=0x7ffff61e3e50, defcount=1, kwdefs=0x0,
    closure=(<cell at remote 0x7ffff7ece598>,)) at ../Python/ceval.c:3588
#18 0x00000000006f7be5 in function_call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/funcobject.c:632
#19 0x000000000046791c in PyObject_Call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/abstract.c:2040
#20 0x00000000004877a9 in method_call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/classobject.c:347
#21 0x000000000046791c in PyObject_Call (func=<method at remote 0x7ffff7eb6bb8>, arg=(), kw=0x0) at ../Objects/abstract.c:2040
#22 0x00000000004fb6a9 in slot_tp_init (self=<QWindow at remote 0x7fffec4af718>, args=(), kwds=0x0) at ../Objects/typeobject.c:6177
#23 0x00000000004e7f95 in type_call (type=0xe673a8, args=(), kwds=0x0) at ../Objects/typeobject.c:898
#24 0x000000000046791c in PyObject_Call (func=<PyQt5.QtCore.pyqtWrapperType at remote 0xe673a8>, arg=(), kw=0x0) at ../Objects/abstract.c:2040
#25 0x00000000005bf45b in do_call (func=<PyQt5.QtCore.pyqtWrapperType at remote 0xe673a8>, pp_stack=0x7fffffffc290, na=0, nk=0) at ../Python/ceval.c:4466
#26 0x00000000005be6de in call_function (pp_stack=0x7fffffffc290, oparg=0) at ../Python/ceval.c:4264
Python Exception <class 'RuntimeError'> Type does not have a target.:
#27 0x00000000005b689e in PyEval_EvalFrameEx (f=, throwflag=0) at ../Python/ceval.c:2838
Python Exception <class 'RuntimeError'> Type does not have a target.:
Python Exception <class 'RuntimeError'> Type does not have a target.:
#28 0x00000000005bbae0 in PyEval_EvalCodeEx (_co=<code at remote 0x7ffff61c9e80>, globals=, locals=, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0)
    at ../Python/ceval.c:3588
Python Exception <class 'RuntimeError'> Type does not have a target.:
Python Exception <class 'RuntimeError'> Type does not have a target.:
#29 0x00000000005a67f3 in PyEval_EvalCode (co=<code at remote 0x7ffff61c9e80>, globals=, locals=) at ../Python/ceval.c:775
Python Exception <class 'RuntimeError'> Type does not have a target.:
Python Exception <class 'RuntimeError'> Type does not have a target.:
Python Exception <class 'RuntimeError'> Type does not have a target.:
#30 0x00000000004279f8 in run_mod (mod=0xbe1a20, filename=, globals=, locals=, flags=0x7fffffffdab0, arena=0xb490b0) at ../Python/pythonrun.c:2180
Python Exception <class 'RuntimeError'> Type does not have a target.:
Python Exception <class 'RuntimeError'> Type does not have a target.:
#31 0x0000000000427731 in PyRun_FileExFlags (fp=0xb9c940, filename_str=0x7ffff7e3cf78 "class_name_collision.py", start=257, globals=, locals=, closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:2133
#32 0x0000000000425648 in PyRun_SimpleFileExFlags (fp=0xb9c940, filename=0x7ffff7e3cf78 "class_name_collision.py", closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:1606
#33 0x0000000000424445 in PyRun_AnyFileExFlags (fp=0xb9c940, filename=0x7ffff7e3cf78 "class_name_collision.py", closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:1292
#34 0x000000000043f254 in run_file (fp=0xb9c940, filename=0xb0c2c0 L"class_name_collision.py", p_cf=0x7fffffffdab0) at ../Modules/main.c:319
#35 0x000000000043ffea in Py_Main (argc=2, argv=0xb0a020) at ../Modules/main.c:751
#36 0x000000000041e6df in main (argc=2, argv=0x7fffffffdd38) at ../Modules/python.c:69
(gdb) frame 7
#7  0x00007fffecd3fb70 in qpycore_qobject_qt_metacast (pySelf=0x7fffec4af718, base=0x7ffff61c2480 <sipTypeDef_QtWidgets_QWidget>, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter",
    sipCpp=0x7fffffff9f88) at ../qpy/QtCore/qpycore_qobject_helpers.cpp:238
238             if (!PyObject_IsInstance((PyObject *)pytype, (PyObject *)&qpycore_pyqtWrapperType_Type))
(gdb) list
233
234         for (SIP_SSIZE_T i = 0; i < PyTuple_GET_SIZE(mro); ++i)
235         {
236             PyTypeObject *pytype = (PyTypeObject *)PyTuple_GET_ITEM(mro, i);
237
238             if (!PyObject_IsInstance((PyObject *)pytype, (PyObject *)&qpycore_pyqtWrapperType_Type))
239                 continue;
240
241             const sipTypeDef *td = ((sipWrapperType *)pytype)->type;
242
(gdb)
"""

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout


class QWindow(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setLayout(QVBoxLayout())
        self.layout().parentWidget()  # <-- uncaught exception is generated and asserted here


qapp = QApplication([])
qwin = QWindow()
qwin.show()
qapp.exec()
	"""
	If class is named as Qt class, sometimes PyQt machinery
	leads to uncaught Python exception inside sipQWidget::qt_metacast,
	which leads to failed Python assertion if Python is build in debug
	mode.

	$ ./python class_name_collision.py
	python: ../Objects/abstract.c:2050: PyObject_Call: Assertion `(result != ((void )0) && !PyErr_Occurred()) \|\| (result == ((void )0) && PyErr_Occurred())' failed.
	Aborted (core dumped)
	$ gdb --args ./python class_name_collision.py
	GNU gdb (Ubuntu 7.9-1ubuntu1) 7.9
	Copyright (C) 2015 Free Software Foundation, Inc.
	License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
	This is free software: you are free to change and redistribute it.
	There is NO WARRANTY, to the extent permitted by law. Type "show copying"
	and "show warranty" for details.
	This GDB was configured as "x86_64-linux-gnu".
	Type "show configuration" for configuration details.
	For bug reporting instructions, please see:
	<http://www.gnu.org/software/gdb/bugs/>.
	Find the GDB manual and other documentation resources online at:
	<http://www.gnu.org/software/gdb/documentation/>.
	For help, type "help".
	Type "apropos word" to search for commands related to "word"...
	Reading symbols from ./python...done.
	(gdb) r
	Starting program: /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/bin/python class_name_collision.py
	[Thread debugging using libthread_db enabled]
	Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
	python: ../Objects/abstract.c:2050: PyObject_Call: Assertion `(result != ((void )0) && !PyErr_Occurred()) \|\| (result == ((void )0) && PyErr_Occurred())' failed.
	[New Thread 0x7fffdfa3f700 (LWP 22088)]
	[New Thread 0x7fffe0483700 (LWP 22087)]
	[New Thread 0x7fffea8b1700 (LWP 22086)]

	Program received signal SIGABRT, Aborted.
	0x00007ffff6ad5cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
	56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
	(gdb) bt
	#0 0x00007ffff6ad5cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
	#1 0x00007ffff6ad90d8 in __GI_abort () at abort.c:89
	#2 0x00007ffff6aceb86 in __assert_fail_base (fmt=0x7ffff6c1f830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
	assertion=assertion@entry=0x704ca8 "(result != ((void )0) && !PyErr_Occurred()) \|\| (result == ((void )0) && PyErr_Occurred())", file=file@entry=0x704332 "../Objects/abstract.c", line=line@entry=2050,
	function=function@entry=0x704f46 <__PRETTY_FUNCTION__.11058> "PyObject_Call") at assert.c:92
	#3 0x00007ffff6acec32 in __GI___assert_fail (assertion=0x704ca8 "(result != ((void )0) && !PyErr_Occurred()) \|\| (result == ((void )0) && PyErr_Occurred())", file=0x704332 "../Objects/abstract.c",
	line=2050, function=0x704f46 <__PRETTY_FUNCTION__.11058> "PyObject_Call") at assert.c:101
	#4 0x00000000004679a0 in PyObject_Call (func=<built-in method __instancecheck__ of type object at remote 0x7fffed02fa00>, arg=(<sip.wrappertype at remote 0x7fffed24fb40>,), kw=0x0)
	at ../Objects/abstract.c:2049
	#5 0x0000000000468bf0 in PyObject_CallFunctionObjArgs (callable=<built-in method __instancecheck__ of type object at remote 0x7fffed02fa00>) at ../Objects/abstract.c:2332
	#6 0x00000000004694f2 in PyObject_IsInstance (inst=<sip.wrappertype at remote 0x7fffed24fb40>, cls=<type at remote 0x7fffed02fa00>) at ../Objects/abstract.c:2522
	#7 0x00007fffecd3fb70 in qpycore_qobject_qt_metacast (pySelf=0x7fffec4af718, base=0x7ffff61c2480 <sipTypeDef_QtWidgets_QWidget>, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter",
	sipCpp=0x7fffffff9f88) at ../qpy/QtCore/qpycore_qobject_helpers.cpp:238
	#8 0x00007ffff5e34945 in sipQWidget::qt_metacast (this=0xd18020, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter") at sipQtWidgetspart0.cpp:328332
	#9 0x00007fffec76ef9c in QObject::inherits (this=0xd18020, classname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter") at /home/bob/Qt/5.5/gcc_64/include/QtCore/qobject.h:422
	#10 0x00007fffec5f6d03 in sipSubClass_QGuiApplication (sipCppRet=0x7fffffffa028) at /mnt/data/bob/qt/PyQt-gpl-5.5.1/sip/QtGui/qguiapplication.sip:137
	#11 0x00007fffed035a2c in ?? () from /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/lib/python3.4/site-packages/sip.so
	#12 0x00007fffed0421db in ?? () from /mnt/data/bob/qt/PyQt5_5.5.1_env_dbg/lib/python3.4/site-packages/sip.so
	#13 0x00007ffff5dfce6d in meth_QLayout_parentWidget (sipSelf=<QVBoxLayout at remote 0x7fffec4af7d8>, sipArgs=()) at sipQtWidgetspart0.cpp:302366
	#14 0x00000000004c9c0b in PyCFunction_Call (func=<built-in method parentWidget of QVBoxLayout object at remote 0x7fffec4af7d8>, arg=(), kw=0x0) at ../Objects/methodobject.c:93
	#15 0x00000000005be480 in call_function (pp_stack=0x7fffffffa5a0, oparg=0) at ../Python/ceval.c:4237
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#16 0x00000000005b689e in PyEval_EvalFrameEx (f=, throwflag=0) at ../Python/ceval.c:2838
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#17 0x00000000005bbae0 in PyEval_EvalCodeEx (_co=<code at remote 0x7ffff7e47a00>, globals=, locals=0x0, args=0x7ffff61ea150, argcount=1, kws=0x0, kwcount=0, defs=0x7ffff61e3e50, defcount=1, kwdefs=0x0,
	closure=(<cell at remote 0x7ffff7ece598>,)) at ../Python/ceval.c:3588
	#18 0x00000000006f7be5 in function_call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/funcobject.c:632
	#19 0x000000000046791c in PyObject_Call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/abstract.c:2040
	#20 0x00000000004877a9 in method_call (func=<function at remote 0x7fffec458058>, arg=(<QWindow at remote 0x7fffec4af718>,), kw=0x0) at ../Objects/classobject.c:347
	#21 0x000000000046791c in PyObject_Call (func=<method at remote 0x7ffff7eb6bb8>, arg=(), kw=0x0) at ../Objects/abstract.c:2040
	#22 0x00000000004fb6a9 in slot_tp_init (self=<QWindow at remote 0x7fffec4af718>, args=(), kwds=0x0) at ../Objects/typeobject.c:6177
	#23 0x00000000004e7f95 in type_call (type=0xe673a8, args=(), kwds=0x0) at ../Objects/typeobject.c:898
	#24 0x000000000046791c in PyObject_Call (func=<PyQt5.QtCore.pyqtWrapperType at remote 0xe673a8>, arg=(), kw=0x0) at ../Objects/abstract.c:2040
	#25 0x00000000005bf45b in do_call (func=<PyQt5.QtCore.pyqtWrapperType at remote 0xe673a8>, pp_stack=0x7fffffffc290, na=0, nk=0) at ../Python/ceval.c:4466
	#26 0x00000000005be6de in call_function (pp_stack=0x7fffffffc290, oparg=0) at ../Python/ceval.c:4264
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#27 0x00000000005b689e in PyEval_EvalFrameEx (f=, throwflag=0) at ../Python/ceval.c:2838
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#28 0x00000000005bbae0 in PyEval_EvalCodeEx (_co=<code at remote 0x7ffff61c9e80>, globals=, locals=, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0)
	at ../Python/ceval.c:3588
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#29 0x00000000005a67f3 in PyEval_EvalCode (co=<code at remote 0x7ffff61c9e80>, globals=, locals=) at ../Python/ceval.c:775
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#30 0x00000000004279f8 in run_mod (mod=0xbe1a20, filename=, globals=, locals=, flags=0x7fffffffdab0, arena=0xb490b0) at ../Python/pythonrun.c:2180
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	Python Exception <class 'RuntimeError'> Type does not have a target.:
	#31 0x0000000000427731 in PyRun_FileExFlags (fp=0xb9c940, filename_str=0x7ffff7e3cf78 "class_name_collision.py", start=257, globals=, locals=, closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:2133
	#32 0x0000000000425648 in PyRun_SimpleFileExFlags (fp=0xb9c940, filename=0x7ffff7e3cf78 "class_name_collision.py", closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:1606
	#33 0x0000000000424445 in PyRun_AnyFileExFlags (fp=0xb9c940, filename=0x7ffff7e3cf78 "class_name_collision.py", closeit=1, flags=0x7fffffffdab0) at ../Python/pythonrun.c:1292
	#34 0x000000000043f254 in run_file (fp=0xb9c940, filename=0xb0c2c0 L"class_name_collision.py", p_cf=0x7fffffffdab0) at ../Modules/main.c:319
	#35 0x000000000043ffea in Py_Main (argc=2, argv=0xb0a020) at ../Modules/main.c:751
	#36 0x000000000041e6df in main (argc=2, argv=0x7fffffffdd38) at ../Modules/python.c:69
	(gdb) frame 7
	#7 0x00007fffecd3fb70 in qpycore_qobject_qt_metacast (pySelf=0x7fffec4af718, base=0x7ffff61c2480 <sipTypeDef_QtWidgets_QWidget>, _clname=0x7fffec7b0631 <sipStrings_QtGui+35953> "QPdfWriter",
	sipCpp=0x7fffffff9f88) at ../qpy/QtCore/qpycore_qobject_helpers.cpp:238
	238 if (!PyObject_IsInstance((PyObject )pytype, (PyObject )&qpycore_pyqtWrapperType_Type))
	(gdb) list
	233
	234 for (SIP_SSIZE_T i = 0; i < PyTuple_GET_SIZE(mro); ++i)
	235 {
	236 PyTypeObject pytype = (PyTypeObject )PyTuple_GET_ITEM(mro, i);
	237
	238 if (!PyObject_IsInstance((PyObject )pytype, (PyObject )&qpycore_pyqtWrapperType_Type))
	239 continue;
	240
	241 const sipTypeDef td = ((sipWrapperType )pytype)->type;
	242
	(gdb)
	"""

	from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout


	class QWindow(QWidget):
	def __init__(self, parent=None):
	super().__init__(parent)
	self.setLayout(QVBoxLayout())
	self.layout().parentWidget() # <-- uncaught exception is generated and asserted here


	qapp = QApplication([])
	qwin = QWindow()
	qwin.show()
	qapp.exec()