Crashes in FEM test suite

[uwestoehr]

So, fir now this is a work around: git commit c3ec0b7c49

Thanks for your investigation.
I hope that VTK 9.x matures over the time soon.

[StefanBruens]

The only real difference is the field Piece. For a valid object it's 0 (and probably any positive value) and for an invalid object -1. Does anybody know what's the exact meaning of Piece is?

The only useful mention of "Piece" I could find is here:

https://vtk.org/doc/nightly/html/classv ... ml#details

[wmayer]

The crash is back: https://forum.freecadweb.org/viewtopic.php?f=8&t=68341

[wmayer]

git commit 5ed2850a03