BRepBuilderAPI_GTransform Crash

Good afternoon,

I am trying to stretch a topods_face (plane), but the BRepBuilderAPI_GTransform crashes:

Microsoft C++ exception: Standard_ConstructionError
error message: Geom_TrimmedCurve::U1 == U2

gp_Vec dir(0, -1, -0);
gp_Pnt locOnPlane(800, 625, 183);
gp_Ax2 xdir(locOnPlane, dir.Reversed());
double multiplier = 0.75000000000002087;
gp_GTrsf x_aff;
x_aff.SetAffinity(xdir, multiplier);

BRepBuilderAPI_GTransform aBRepGTrsf(face, x_aff);
auto result = TopoDS::Face(aBRepGTrsf.Shape());

What could be the cause of this crash? I am using OCCT 7.9.

Thanks,

Martijn