ASSERT when using QPolygonF::united() on an polygon with infinite bounds

#include <QPolygon>
#include <limits>

int main(int argc, char *argv[])
{
    const float inf = std::numeric_limits<float>::infinity();

    QPolygonF polygon(QRectF(0, 0, 100, 100));
    QPolygonF polygon2(QRectF(0, 0, inf, 50));

    QPolygonF result = polygon.united(polygon2);
    Q_UNUSED(result)
}

0	qt_message_output	qglobal.cpp	2270	0x6503427d	
1	qt_message	qglobal.cpp	2328	0x650343f9	
2	qFatal	qglobal.cpp	2511	0x65034739	
3	qt_assert	qglobal.cpp	2027	0x65033db9	
4	QPathSegments::mergePoints	qpathclipper.cpp	782	0x644a8ea9	
5	QWingedEdge::intersectAndAdd	qpathclipper.cpp	809	0x644a9073	
6	QWingedEdge::QWingedEdge	qpathclipper.cpp	879	0x644a9473	
7	QPathClipper::clip	qpathclipper.cpp	1652	0x644ac420	
8	QPainterPath::united	qpainterpath.cpp	3181	0x644a0056	
9	QPolygonF::united	qpolygon.cpp	949	0x644c599f	
10	main	main.cpp	46	0xea113d	
11	WinMain	qtmain_win.cpp	131	0xea246a	
12	__tmainCRTStartup	crtexe.c	547	0xea19a0	
13	WinMainCRTStartup	crtexe.c	371	0xea172f	
14	BaseThreadInitThunk	kernel32		0x74a833ca	
15	__RtlUserThreadStart	ntdll		0x76ec9ed2	
16	_RtlUserThreadStart	ntdll		0x76ec9ea5