Comment 2 for bug 1216167

StacktraceTop:
 pathv_to_linear_and_cubic_beziers (pathv=...) at helper/geom.cpp:469
 Inkscape::UI::PathManipulator::_createControlPointsFromGeometry (this=this@entry=0x87fce60) at ui/tool/path-manipulator.cpp:999
 Inkscape::UI::PathManipulator::_externalChange (this=0x87fce60, type=<optimized out>) at ui/tool/path-manipulator.cpp:963
 Inkscape::XML::CompositeNodeObserver::notifyAttributeChanged (this=0x5f6f050, node=..., name=3553, old_value=..., new_value=...) at xml/composite-node-observer.cpp:94
 Inkscape::XML::SimpleNode::setAttribute (this=0x5f6f000, name=<optimized out>, value=<optimized out>) at xml/simple-node.cpp:356