UnloadModel exception when freeing VBO

[ShaharKlingerSSYS]

Hello everyone,

I've been struggling with this for the last 2 days, and can't seem to find the cause: when calling UnloadModel, I get an exception thrown at line 1763 in rmodels.c - that is the command RL_FREE(mesh.vboId);.

What can be the scenario or cause this line throws an exception? The model has only one mesh, the vertex array is unloaded successfully, vboId is not NULL.

Thanks for helping.

[raysan5]

@ShaharKlingerSSYS How are you loading/creating the model? Please, could you show the loading/creation code?

The issue could be related to mesh.vboId array not being properly initialized or maybe freed manually before UnloadModel().

[ShaharKlingerSSYS]

Well, strangely enough, this problem disappears in release build, but persists in debug (usually it's the other way around...).

The values of mesh.vboId after uploading are: 74, 75, 76, 0, 0, 0, 0.

I tried adding all-zero texture coordinates to the mesh but that didn't solve the issue.

[raysan5]

That's really weird, it should be debugged carefully to see where the issue could be...

[ShaharKlingerSSYS]

Indeed, something is really weird. When I use the function GenMeshPoly there's no problem, but when I copy that function's code without change to my main program, it crashes when unloading the model.

I can confirm it happens with a small stand alone program, outside the project I'm working on. Maybe something to do with my project's setup...?

[raysan5]

Hey! I think I know the issue! You are using different allocators to load and free the memory! Try using raylib MemAlloc() for your vertex arrays instead of system provided malloc().

[ShaharKlingerSSYS]

Wow, good call! That was indeed the problem. It's working perfectly now.

Thank you very much for your help! All the best.

[raysan5]

Nice! 👍😄