drawText() crashes it is called in a loop to draw symbols/glyphs

Drawing a lot of glyphs instantiating QFont in a loop over unicode characters up to 0x8000 and point size eventually fails and application crashes

drawText() persistently  crashes when executed in large loop for symbols/glyphs for a font family. It does draw few but at the end crashes with following message:

Attached example reproduces it.

QWindowsFontEngine::QWindowsFontEngine: CreateFontIndirect failed for family 'STFangsong' ()

QPixmap::fromWinHICON(), failed to GetIconInfo() ()

QWindowsBackingStore::flush: GetDC failed ()

ASSERT: "hdc" in file qwindowsnativeimage.cpp, line 66

createDIB: CreateDIBSection failed.