PMP::clip(mesh, plane) crashes the session when using Valgrind

[stla]

Hello,

I checked my R package with Valgrind and when clipping a mesh to a plane with PMP::clip, there's a crash. You can find the Valgrind report and a reproducible code in this gist. I tried to put some std::cout in a corefinement visitor and then I observed that after_face_copy() is never triggered. The actions before_subface_creation and after_subface_created are triggered.

I always use Epeck and usually when I have a crash with Valgrind, I also have the same crash if I replace Epeck with Epick. I don't think this is the case here, but I will try.

[stla]

I always use Epeck and usually when I have a crash with Valgrind, I also have the same crash if I replace Epeck with Epick. I don't think this is the case here, but I will try.

I confirm: no crash with Epick.

[sloriot]

Valgrind does not like rounding mode changes done by CGAL. See #3094

[stla]

Ok. But this error is different to the ones I already encountered with Valgrind.

Just checking another example of clip(mesh, plane) and crash as well, but not the same.

The other clipping functions, clip(mesh1, mesh2) and clip(mesh, isocuboid), work fine with Valgrind.

[sloriot]

Except if you compile your exe with the option to disable rounding mode changes, Valgrind is not expected to work with CGAL. If you can reproduce an error without Valgrind I can have a look otherwise it is most probably an usual issue with Valgrind.