Mantaflow likes to throw exceptions when things go wrong, which includes a
simple case of the solver not converging sufficiently. This should not be
catastrophic, but cleanup of buffers is omitted when such an exception occurs.
This then leads to yet another failure when the solver is stopped because of
incorrect buffer refcounts. That exception bubbles up through the python layer
and causes errors in the Blender integration wrapper that cause crashes.
Pull Request: https://projects.blender.org/blender/blender/pulls/147527
Mainly updated the Mantaflow version. It includes the new viscosity solver plugin based on the method from 'Accurate Viscous Free Surfaces for Buckling, Coiling, and Rotating Liquids' (Batty & Bridson).
In the UI, this update adds a new 'Viscosity' section to the fluid modifier UI (liquid domains only). For now, there is a single 'strength' value to control the viscosity of liquids.
Includes preprocessed Mantaflow source files for both OpenMP and TBB (if OpenMP is not present, TBB files will be used instead).
These files come directly from the Mantaflow repository. Future updates to the core fluid solver will take place by updating the files.
Reviewed By: sergey, mont29
Maniphest Tasks: T59995
Differential Revision: https://developer.blender.org/D3850
