QStaticText crashes with zero-width unicode string

The following crashes with:

ASSERT: "size == ti.glyphs.numGlyphs" in file text/qstatictext.cpp, line 460

#include <QtGui>

int main(int argc, char** argv)
{
QApplication app(argc, argv);

QStaticText text;
text.setText(QString::fromAscii("A͗ͦ"));
text.prepare(QTransform(), QFont());

return 0;
}