Qt 5.9.4 Known Issues

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This changes the semantics of URL redirects. Previously a redirected URL was used as the base URL for furher URL resolution. This doesn't work because redirection occurs after interception and interception should not influence the resolution of further URLs. We now use the original URL as base URL for resolution of further URLs and rely on the server to redirect those, too.
  • Old qt-unified-online-installer-3.0.1 (or older) can't any more be used to get Qt 5.9.4 (or later releases), see QTBUG-65798
    • For new installations use newest online installer (qt-unified-x86-3.0.2-online). For existing installations please update maintenance tool at first.


  • Static builds of Qt with Microsoft Visual Studio 2017 (through Update 2) do not work and will likely crash at runtime. This is believed to be a compiler bug and therefore an update from Microsoft is required. See https://bugreports.qt.io/browse/QTBUG-59721.


Building Qt modules fails with binaries delivered with online installer see bug QTBUG-53865. Workaround is to build whole Qt from source or have libicu 56 installed on the system.



Qt for Android known issues





Qt3D not working with i.MX6, reverting commit ad58631a946cd733a34b04634270eb1ac74941bc fixes the issue, https://bugreports.qt.io/browse/QTBUG-59349

Qt for Device Creation