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[JuanLu <>]

I don't have more clues about the problem. Perhaps, you should link your
program with CGAL debug library in order to see the exact line of CGAL
source code where assertion exception is thrown.

Delaunay triangulation try to build equilateral triangle mesh. If you insert
a vertex near an edge (and triangulation is constrained), the probability
circumcicle contains a vertex that belongs other triangle is very high and
it's not possible accomplish Delaunay condition.



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