QPainterPath uses QTextLayout internally but caching is enabled by default with no way of disabling it through the QPainterPath API

When using QPainterPath to render text, a QTextLayout is used internally. QTextLayout has the ability to disable caching but this option is enabled by default inside the QPainterPath code with no way of disabling it externally.
The attached code reproduces the problem which seems to use ever increasing amounts of memory with each push of the button.