ERORS IN SURFACE MESH
Dear Christophe Geuzaine
here a minimal(?) example showing errors in the construction of boundary layers. I use (gmsh) version (4.10.0-git-f8d405fb) and OS (OpenSuse 15.3). I do not know if it is interesting to you, since in any case one can mesh just a single surface, otherwise (setAsBoundaryLayer) complains about adjacent surfaces.
Sincerely, Guido.