Qt 5.12.0 and 5.12.1 crashing intermittently on Mac
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I had various problems with Qt releases on Mac:
https://successfulsoftware.net/2018/11/02/qt-is-broken-on-macos-right-now/So I was glad to see that the Qt 5.12.0 release fixed these problems.
However users have been reporting intermittent crashes of my software built with Qt 5.12.0 on Mac. So I switched to 5.12.1. But this doesn't seem to have helped at all.
The crash pretty much always happens here:
0 org.qt-project.QtCore 0x000000010d138fe8 QMetaObject::cast(QObject*) const + 24 1 org.qt-project.QtWidgets 0x000000010c47674b QWidget::isActiveWindow() const + 283 2 org.qt-project.QtWidgets 0x000000010c486aad QWidget::initPainter(QPainter*) const + 45 3 org.qt-project.QtGui 0x000000010cc508dd QPainter::begin(QPaintDevice*) + 781 4 org.qt-project.QtGui 0x000000010cc505c2 QPainter::QPainter(QPaintDevice*) + 242 5 org.qt-project.QtWidgets 0x000000010c479937 QWidgetPrivate::drawWidget(QPaintDevice*, QRegion constBut I am not able to reproduce it here. Which makes it very hard to fix.
I have also noticed that switching focus from a QComboBox menu and back again can cause the drop-down menu to blank.
Identical code running on Qt 5.11.0 on Windows is rock solid.
Any ideas?
Andy Brice
https://www.perfecttableplan.com/
