Original bug:. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=800375
When using uic (Qt5 version) with the following UI file:
The generated header file will include <QtWidgets/QRegExpValidator>.
This file does not exist on Debian [maintainer note: because it's the wrong path].
Instead, the generated header file should include
QtGui/QRegExpValidator> as provided by the qtbase5-dev package
[maintainer note: package that provides headers for the qtbase submodule].
I could also reproduce it with Qt 5.4.0.