Error assigning per-element materials to multiple bodies

[akr97]

I'm trying to simulate multiple deformable objects in a scene, each with material parameters being assigned per element from a file. This results in a crash, due to a heap-buffer overflow in the "Assigning rhs" phase.

Attached is a zip file containing simple example:

• In "constant.json", 4 cubes are simulated each with constant material properties which works.
• In "per_element.json", we have the same setup with the 4 cubes, but the materials are assigned per element from a file. This fails as explained above.
• In "single_cube.json", we have a single cube being simulated using the same per element materials and it works fine, so the error is unlikely to be due to bad material parameters.

My simulations are run on a 2021 M1 MacBook Pro. I've attached the output with an error trace from Address Sanitizer in the attached file 'trace.txt'.

Platform

• Windows
• macOS
• Linux

trace.txt
small_multi.zip