Qt 5.12.5 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2019)
====================================================================================

QPainterPath QPainterPath: Element count=13
 -> MoveTo(x=15, y=10)
 -> CurveTo(x=15, y=12.7614)
 -> CurveToData(x=12.7614, y=15)
 -> CurveToData(x=10, y=15)
 -> CurveTo(x=7.23858, y=15)
 -> CurveToData(x=5, y=12.7614)
 -> CurveToData(x=5, y=10)
 -> CurveTo(x=5, y=7.23858)
 -> CurveToData(x=7.23858, y=5)
 -> CurveToData(x=10, y=5)
 -> CurveTo(x=12.7614, y=5)
 -> CurveToData(x=15, y=7.23858)
 -> CurveToData(x=15, y=10)

QPolygonF QPolygonF(QPointF(15,10)QPointF(1.16075e-311,1.16174e-311)QPointF(1.16075e-311,1.16174e-311)QPointF(10,15)QPointF(1.16075e-311,1.16174e-311)QPointF(1.16075e-311,1.16174e-311)QPointF(5,10)QPointF(1.16075e-311,1.16174e-311)QPointF(1.16075e-311,1.16174e-311)QPointF(10,5)QPointF(1.16075e-311,1.16174e-311)QPointF(1.16075e-311,1.16174e-311)QPointF(15,10))

contains QPointF(1.16075e-311,1.16174e-311)   false

Qt 5.13.1 (x86_64-little_endian-llp64 shared (dynamic) debug build; by MSVC 2017)
====================================================================================

QPainterPath QPainterPath: Element count=13
 -> MoveTo(x=15, y=10)
 -> CurveTo(x=15, y=12.7614)
 -> CurveToData(x=12.7614, y=15)
 -> CurveToData(x=10, y=15)
 -> CurveTo(x=7.23858, y=15)
 -> CurveToData(x=5, y=12.7614)
 -> CurveToData(x=5, y=10)
 -> CurveTo(x=5, y=7.23858)
 -> CurveToData(x=7.23858, y=5)
 -> CurveToData(x=10, y=5)
 -> CurveTo(x=12.7614, y=5)
 -> CurveToData(x=15, y=7.23858)
 -> CurveToData(x=15, y=10)

QPolygonF QPolygonF(QPointF(15,10)QPointF(14.6071,11.9462)QPointF(13.5355,13.5355)QPointF(11.9462,14.6071)QPointF(10,15)QPointF(8.05377,14.6071)QPointF(6.46447,13.5355)QPointF(5.39292,11.9462)QPointF(5,10)QPointF(5.39292,8.05377)QPointF(6.46447,6.46447)QPointF(8.05377,5.39292)QPointF(10,5)QPointF(11.9462,5.39292)QPointF(13.5355,6.46447)QPointF(14.6071,8.05377)QPointF(15,10))

contains QPointF(14.6071,11.9462)   true