[OpenSCAD] ERROR: CGAL error in CGAL_Nef_polyhedron3(): CGAL ERROR: assertion violation! Expr: e_below != SHalfedge_handle() File: /opt/mxe/usr/x86_64-w64-mingw32.static.posix/include/CGAL/Nef_3/SNC_FM_decorator.h

[Experimentalist]

I am receiving this message when trying to subtract 2 cylinders from an
imported STL when using OpenSCAD version 2018.06.01 (git 4455a12)

I can attach some files to reproduce the error if needed?



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[Experimentalist]

Holder_as_rendered.stl
<http://forum.openscad.org/file/t1222/Holder_as_rendered.stl>
Modify.scad <http://forum.openscad.org/file/t1222/Modify.scad>

Files attached



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