[QGIS-Developer] Connected problems with QGIS3 crashes and python standalone crashes?

John Harrop jcharrop at gmail.com
Wed Oct 31 20:58:28 PDT 2018


Nothing like posting a question to trigger stumbling across the solution.  It appears that a solution was found back in the Summer in this thread: 
https://www.mail-archive.com/qgis-user@lists.osgeo.org/msg40317.html

I tried adding this and both of the problems seem to have gone - although I still did get an exception when I exited the bare bones standalone python code.

export QT_QPA_PLATFORM_PLUGIN_PATH="/Applications/QGIS3.app/Contents/Plugins"

John




Hello,

Now that QGIS3 is well underway I’ve been looking at getting some Python3 code working with QGIS as standalone and plugins apps.  But I have two - possibly related persistent problems with QGIS3 and this list was suggested as a good place to ask advice.

I’m running 3.4 (just upgraded yesterday) on Mac OSX 10.13.6

I can work in QGIS and have been using it for ongoing work - so everything seems good until I get to quitting.  Shortly after I’ve closed QGIS I get crash report (parts included below).  Its a bit unclear exactly what is causing the crash - and its been happening since I went to QGIS3.  I should (admit) that I was also running the beta and building that so there is a possibility that I have some left over side effects of that I have not been able to clean up.  I have taken out everything I can track down on that and some other dev things (not QGIS) I was doing a year or longer ago.

The other crash that may be related and seems to give more info is when I run the basic standalone app example from the PyQGIS book.  The : = QgsApplication([], False) crashes with an abort trap 6 and the message: qt.qpa.plugin: Could not find the Qt platform plugin "cocoa" in “"

This looks a lot like a missing path problem, but I have been unable to resolve where it is missing.  As far as I can see the qt and cocoa support libraries are in the GIS3 app contents subdirectories, so I’m at a loss as to what is really missing.

Any suggestions for where to go would be appreciated.


John Harrop
Senior Project Geologist
CMG

Here is a part of the crash report after closing the QGIS app.  QT seems to be involved in this too - although the details are less clear to me.  So I’m hoping that solving one problem will clear both.:

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   org.qt-project.QtWidgets      	0x000000011524fd6e QWidget::mapTo(QWidget const*, QPoint const&) const + 46
1   org.qgis.qgis3_gui            	0x0000000110221bef QgsFloatingWidget::onAnchorPointChanged() + 375
2   org.qt-project.QtCore         	0x0000000118e7053b QMetaObject::activate(QObject*, int, int, void**) + 2347
3   org.qgis.qgis3_gui            	0x0000000110222027 QgsFloatingWidgetEventFilter::eventFilter(QObject*, QEvent*) + 21
4   org.qt-project.QtCore         	0x0000000118e3f832 QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) + 210
5   org.qt-project.QtWidgets      	0x000000011522befd QApplicationPrivate::notify_helper(QObject*, QEvent*) + 285
6   org.qt-project.QtWidgets      	0x000000011522d2ed QApplication::notify(QObject*, QEvent*) + 573
7   org.qgis.qgis3_core           	0x000000011127cb21 QgsApplication::notify(QObject*, QEvent*) + 93
8   org.qt-project.QtCore         	0x0000000118e3f54f QCoreApplication::notifyInternal2(QObject*, QEvent*) + 159
9   org.qt-project.QtWidgets      	0x0000000115286ec7 0x11521c000 + 437959
10  org.qt-project.QtWidgets      	0x000000011528512d 0x11521c000 + 430381
11  org.qt-project.QtWidgets      	0x000000011522bf12 QApplicationPrivate::notify_helper(QObject*, QEvent*) + 306
12  org.qt-project.QtWidgets      	0x000000011522d2ed QApplication::notify(QObject*, QEvent*) + 573
13  org.qgis.qgis3_core           	0x000000011127cb21 QgsApplication::notify(QObject*, QEvent*) + 93
14  org.qt-project.QtCore         	0x0000000118e3f54f QCoreApplication::notifyInternal2(QObject*, QEvent*) + 159
15  org.qt-project.QtGui          	0x000000011862a1cd QGuiApplicationPrivate::processGeometryChangeEvent(QWindowSystemInterfacePrivate::GeometryChangeEvent*) + 381
16  org.qt-project.QtGui          	0x000000011860f9b4 QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 404
17  org.qt-project.QtGui          	0x000000011860b320 QWindowSystemInterface::flushWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 576
18  libqcocoa.dylib               	0x000000011b493a65 0x11b480000 + 80485
19  org.qt-project.QtCore         	0x0000000118e496dc QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const + 1308
20  libqcocoa.dylib               	0x000000011b49a06d 0x11b480000 + 106605
21  com.apple.Foundation          	0x00007fff3097c640 -[__NSObserver _doit:] + 303
22  com.apple.CoreFoundation      	0x00007fff2e86eedc __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
23  com.apple.CoreFoundation      	0x00007fff2e86edaa _CFXRegistrationPost + 458
24  com.apple.CoreFoundation      	0x00007fff2e86eae1 ___CFXNotificationPost_block_invoke + 225
25  com.apple.CoreFoundation      	0x00007fff2e82c880 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1664
26  com.apple.CoreFoundation      	0x00007fff2e82b9b7 _CFXNotificationPost + 599
27  com.apple.AppKit              	0x00007fff2be1d35b -[NSView _postFrameChangeNotification] + 314
28  com.apple.AppKit              	0x00007fff2be1787b -[NSView setFrameSize:] + 2061
29  com.apple.AppKit              	0x00007fff2be2db1e -[NSView setFrame:] + 371
30  com.apple.AppKit              	0x00007fff2be3849c -[NSThemeFrame _relayoutAuxiliaryViewsOfType:] + 163
31  com.apple.AppKit              	0x00007fff2be383e6 -[NSThemeFrame relayoutAuxiliaryViewsOfType:] + 27
32  com.apple.AppKit              	0x00007fff2c163237 -[NSTitlebarViewController removeChildViewControllerAtIndex:] + 431
33  com.apple.AppKit              	0x00007fff2c6522c6 -[NSWindowStackController _removeTabBarAccessoryViewControllerForWindow:] + 213
34  com.apple.AppKit              	0x00007fff2c653162 -[NSWindowStackController removeWindow:] + 277
35  com.apple.AppKit              	0x00007fff2c1dc97d -[NSWindow(NSWindowTabbing) _doTabbedWindowCleanupForOrderOut] + 97
36  com.apple.AppKit              	0x00007fff2c6c903d __79-[NSWindow _reallyDoOrderWindowOutRelativeTo:findKey:forCounter:force:isModal:]_block_invoke + 62
37  com.apple.AppKit              	0x00007fff2bf19c0c NSPerformVisuallyAtomicChange + 146
38  com.apple.AppKit              	0x00007fff2c6c8cbc -[NSWindow _reallyDoOrderWindowOutRelativeTo:findKey:forCounter:force:isModal:] + 340
39  com.apple.AppKit              	0x00007fff2bf218ec -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 172
40  com.apple.AppKit              	0x00007fff2bf20765 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 287
41  com.apple.AppKit              	0x00007fff2bf205cb -[NSWindow orderWindow:relativeTo:] + 169
42  libqcocoa.dylib               	0x000000011b492f79 0x11b480000 + 77689
43  org.qt-project.QtGui          	0x0000000118631c63 QWindowPrivate::setVisible(bool) + 1123
44  org.qt-project.QtWidgets      	0x0000000115262f56 QWidgetPrivate::hide_sys() + 214
45  org.qt-project.QtWidgets      	0x0000000115265787 QWidgetPrivate::hide_helper() + 183
46  org.qt-project.QtWidgets      	0x0000000115265be9 QWidget::setVisible(bool) + 281
47  org.qt-project.QtWidgets      	0x0000000115255052 QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) + 290
48  org.qt-project.QtWidgets      	0x0000000115254b1b QWidget::~QWidget() + 699
49  libqgis_app.3.4.0.dylib       	0x000000010f37ec81 QgisApp::~QgisApp() + 2245
50  libqgis_app.3.4.0.dylib       	0x000000010f37f0c2 QgisApp::~QgisApp() + 14
51  org.qgis.qgis3                	0x000000010ee7d5a1 main + 22017
52  libdyld.dylib                 	0x00007fff566a4015 start + 1





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20181031/efd0f563/attachment-0001.html>


More information about the QGIS-Developer mailing list