Details
Description
If you launch Jupyter QtConsole using PySide2 as its Qt bindings, and exit it (even if you immediately close it after doing nothing) you will get this error when closing the window:
$ jupyter-qtconsole Fatal Python error: deallocating None Current thread 0x0000000101896340 (most recent call first): Abort trap: 6
This is probably due to reference counting not being right somewhere - not quite sure where this is happening yet though.
Minimal example:
from PySide2 import QtWidgets app_instance = QtWidgets.QApplication([]) # If this is commented, application doesn't crash on exit anymore. app_instance2 = app_instance w = QtWidgets.QMainWindow() w.setWindowTitle('Hello World!') w.resize(250, 150) w.show() app_instance.exec_()
Stacktrace:
frame #0: 0x00007fffcb80ad42 libsystem_kernel.dylib`__pthread_kill + 10
frame #1: 0x00007fffcb8f8457 libsystem_pthread.dylib`pthread_kill + 90
frame #2: 0x00007fffcb770420 libsystem_c.dylib`abort + 129
frame #3: libpython3.5m.dylib`Py_FatalError(msg="deallocating None") at pylifecycle.c:1385
frame #4: libpython3.5m.dylib`none_dealloc(ignore=0x000000010165ca38) at object.c:1372
frame #5: libpython3.5m.dylib`insertdict(mp=0x000000010078dcc8, key=0x0000000106b053e8, hash=-5214649808865345009, value=0x00000001003212f8) at dictobject.c:809
frame #6: libpython3.5m.dylib`PyDict_SetItem(op=0x000000010078dcc8, key=0x0000000106b053e8, value=0x00000001003212f8) at dictobject.c:1228
frame #7: libpython3.5m.dylib`_PyModule_ClearDict(d=0x000000010078dcc8) at moduleobject.c:593
frame #8: libpython3.5m.dylib`_PyModule_Clear(m=0x000000010077df48) at moduleobject.c:544
frame #9: libpython3.5m.dylib`PyImport_Cleanup at import.c:460
frame #10: libpython3.5m.dylib`Py_Finalize at pylifecycle.c:576
frame #11: libpython3.5m.dylib`Py_Main(argc=2, argv=0x0000000100502b70) at main.c:788
frame #12: python`main(argc=2, argv=0x00007fff5fbff260) at python.c:65
frame #13: 0x00007fffcb6dc235 libdyld.dylib`start + 1
Attachments
Issue Links
- is duplicated by
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PYSIDE-632 Fatal Python error on close when running embedding_in_qt5.py
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- Closed
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