Encountering an unknown bug in SAT.collide() (Update: I think I found the issue)

I am trying to keep the tab open as I am not sure this bug is recreatable. I am using matter.js for the server later, so I am desperate to fix this issue.

The game was running smoothly and all of a sudden it broke. The error is coming from SAT.collide(). Specifically this line.

axes = [axisBodyA.axes[previousCollision.axisNumber]];

In my case, axisBodyA.axes only has 5 axes, but previousCollision.axisNumber is 5;

However, after some checking, other same type bodies are having 6 axes. All of them include the problematic body is a circle with 10 vertices. So somehow this body has reduced its’ number of axes.

Can anyone tell me what can cause this issue? Could it be because I did the Body.scale() to it?

backup screenshot: https://stabfish.io/dwUploads/matterjsbug.png

[hanzooo]

@hanzooo do you mean that upgrading solved the issue for you? Or something else?

@liabru Yes, the upgrading solved the issue, it works good.

[liabru]

Thanks for confirming, closing this as hopefully that means it’s solved.