There is Qt Creator 4.4.0, Qt 5.9.1, Windows 7x64 system

Everything worked, after one unsuccessful compilation of the project - Qt dumps more than 1000 (or more precisely 1287) errors and almost 11000 problems on any Qt project, even native examples don't work. Everywhere swears at its internal components (such as

C:\Qt\Qt5.9.1\5.9.1\mingw53_32\include\QtCore\qobjectdefs.h:144: ошибка: return type 'class QString' is incomplete { return staticMetaObject.tr(s, c, n); }, C:\Qt\Qt5.9.1\5.9.1\mingw53_32\include\QtCore\qmap.h:112: ошибка: 'QMapNode<Key, T>::key' has incomplete type Key key;),

and so on to all that relates to Qt. Normally only console applications are built and working. Who met with this? how to overcome?

ps reinstalling the environment does not offer - this is an extreme case. I would like to find a solution without reinstalling

    1 answer 1

    After a long search, a solution other than how to reinstall Qt was never found.