qbytearray.h:443:5: error: ‘QByteArray::operator QNoImplicitBoolCast() const’ is private

In file included from /home/qt/work/install/include/QtCore/QByteArray:1:0,
                 from scenegraph/coreapi/qsgshaderrewriter.cpp:40:
/home/qt/work/install/include/QtCore/qbytearray.h: In function ‘QByteArray qsgShaderRewriter_insertZAttributes(const char*, QSurfaceFormat::OpenGLContextProfile)’:
/home/qt/work/install/include/QtCore/qbytearray.h:443:5: error: ‘QByteArray::operator QNoImplicitBoolCast() const’ is private
     operator QNoImplicitBoolCast() const;
     ^
scenegraph/coreapi/qsgshaderrewriter.cpp:219:27: error: within this context
                         + "    gl_Position.z = (gl_Position.z * _qt_zRange + _qt_order) * gl_Position.w;\n"
                           ^
In file included from /home/qt/work/install/include/QtCore/QByteArray:1:0,
                 from scenegraph/coreapi/qsgshaderrewriter.cpp:40:
/home/qt/work/install/include/QtCore/qbytearray.h:443:5: error: ‘QByteArray::operator QNoImplicitBoolCast() const’ is private
     operator QNoImplicitBoolCast() const;
     ^
scenegraph/coreapi/qsgshaderrewriter.cpp:220:49: error: within this context
                         + QByteArray(tok.pos - 1);
                                                 ^
Makefile:37334: recipe for target '.obj/qsgshaderrewriter.o' failed
make[2]: *** [.obj/qsgshaderrewriter.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/home/qt/work/qt/qtdeclarative/src/quick'
Makefile:95: recipe for target 'sub-quick-make_first-ordered' failed
make[1]: *** [sub-quick-make_first-ordered] Error 2
make[1]: Leaving directory '/home/qt/work/qt/qtdeclarative/src'
Makefile:47: recipe for target 'sub-src-make_first' failed
make: *** [sub-src-make_first] Error 2