Missing CUT surfaces in 6.5.4

I just compiled and installed 6.5.4 and am using it in FreeCAD 0.13.
When I reach some unknown level of complexity, CUT surfaces start going missing.
Is there anything I can do about that?

I'm only guessing, but it seems like that's the kind of thing to expect if the program had run out of memory.

fester's picture

Linux Ubuntu 12.04.1
FreeCAD 0.13 rev 1766 (GR)
OpenCASCADE 6.5.4

Choose Part workbench

Select Cut012
Ctrl Torous012
Make a cut of two shapes

At the point where the shapes intersected, note how the appropriate surfaces are missing, and an inappropriate one is still there.