Qt 6.6 Known Issues

• Check that your system meets Qt's requirements
• All open issues can be found from Jira
  • RTA findings here
• Supported development platforms are listed here

All platforms

• Building Qt from sources with -no-gui fails in qtspeech (QTBUG-117824) (Fixed in Qt 6.6.1)

• Configuring a Qt for cross-compiling might error out in qttools (QTBUG-117974) (Fixed in Qt 6.6.1)

• Building Qt might fail with 'fatal error: 'QtXml/qtxmlglobal.h' file not found' in qt5compat (QTBUG-117825) (Fixed in Qt 6.6.1)

• Using a QML singleton where the instance is of a subtype of the registered type (instead of the registered type) can lead to function calls no longer working (QTBUG-117891). A fix is available, and will be part of Qt 6.6.1 (Fixed in Qt 6.6.1)

• Loading malformed SVGs may cause the application to crash: QTBUG-117944). (Fixed in Qt 6.6.1)
• A project with a qt_add_library(INTERFACE) call will fail to configure when using CMake < 3.18. The workaround is to use a newer CMake (QTBUG-122266) (Fixed in Qt 6.6.3)

Linux

• Commercial only Debian repositories
  • missing debian packages for QtWebengine, QtWebview and QtGrpc
  • missing qt6.6.0-full-dbg meta package.

macOS

• Due to changes in notarization from XCode 13 onwards, macOS debug information files are delivered as part of the online installer only and installed automatically.

Android

Qt for Android known issues

iOS

• Deploying and running applications on iOS 17 devices via Qt Creator is currently unsupported, due to changes the underlying Apple libraries used to communicate with the device. As a workaround, open the Xcode project generated by Qt Creator and run and debug the application via Xcode.