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(gdb) p *this
$10 = (Vertex3d) {
<Vertex> = {
<Point2d> = {
<span style="color: rgb(153, 0, 0);">_vptr.Point2d = 0x400b70,</span>
_x = 0,
_y = 0
},
members of Vertex:
<span style="color: rgb(102, 0, 0);">_vptr.Vertex = 0x400b18,</span>
next = 0x4009c0
},
<Point3d> = {
members of Point3d:
<span style="color: rgb(153, 0, 0);">_vptr.Point3d = 0x400b40,</span>
_z = 5.87993804e-39
},
members of Vertex3d:
mumble = 0
}