Qt 6.7 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

• 6.7.2, 6.7.3 Formatting a datetime, with a format that includes its time-zone or offset may crash, for local time or the system time-zone, if determining the system time-zone fails (QTBUG-129696).
• 6.7.3 An erroneous assert in QDateTimeParser may trigger on valid dates when parsed using e.g. QDate::fromString.
  • This only applies to debug builds of Qt or builds of Qt is configured with asserts enabled for release builds.
  • QDate::fromString is used internally in various places in Qt, including Network, so the assert may be triggered indirectly.
• 6.7.3 If QLocale::uiLanguages() shows multiple languages, QTranslator::load() might load lower-priority ones (QTBUG-129434).
• 6.7.3 Qt Designer does not write out layout alignment properties correctly (QTBUG-129503)
• 6.7.3 QString::replace(pos, len, replacement) fails to check that replacement doesn't alias *this before resizing, causing a read of possibly-deleted data (fix: https://codereview.qt-project.org/c/qt/qtbase/+/627375). Work-around: make sure that the replacement is not aliasing *this.
• 6.7.0-3 QAbstactItemView fails to disconnect from the old QAbstractItemDelegate (fix: https://codereview.qt-project.org/c/qt/qtbase/+/636220). Work-around: ensure the old item delegate is deleted after the new one is set.

Linux

• Commercial only Debian repositories
  • missing debian packages for QtWebengine, QtWebview and QtGrpc
  • missing qt6.6.0-full-dbg meta package.
• Building QtApplicationManager projects using the arm64 config from the Installer might fail because of a missing dependency (QTBUG-123796)

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.

Windows

WindowsVistaStyle: Embedding QComboBox into QScrollArea results in black QComboBox-Popup.

WebEngine: Using OpenGL as RHI backend will unconditionally crash WebEngine in 6.7.0. The issue is resolved in the 6.7.1 release.

Android

Qt for Android known issues

iOS

• Deploying and running applications on iOS 17 devices via Qt Creator is currently unsupported, due to changes in 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.

Embedded Linux

• Widget applications using QMenu crash when menus are used with EGLFS platform plugin, see QTBUG-123962