QPainter::drawText doesn't set boundingRect when pen style is Qt::NoPen

QPainter::drawText(..., boundingRect) doesn't set boundingRect if the style of the painter is set to Qt::NoPen. This is due to an early exit test at the beginning of the function. Depending on the semantic of the function, I think boundingRect should be set either to the size of the bounding rectangle if a solid pen were used (what I would expect) or a null size rectangle. Note that drawText is used by QPainter::boundingRect(...) to calculate the returned rectangle.

Test case attached.