Had a Fatal Error, reason unknown: vertexA is undefined about matter-js HOT 4 OPEN

@dragonwhites I've also just started to get this issue while refactoring some code. I do think it's my code, but all the bodies do seem correct. But did you find a fix in the end?

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@dragonwhites I've also just started to get this issue while refactoring some code. I do think it's my code, but all the bodies do seem correct. But did you find a fix in the end?

I do not find the fix, since I can't replicate the issue and it's super rare, I just updated the library to 0.19 and hope for the best.... May I know what is your library version?

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@dragonwhites I've also just started to get this issue while refactoring some code. I do think it's my code, but all the bodies do seem correct. But did you find a fix in the end?

I do not find the fix, since I can't replicate the issue and it's super rare, I just updated the library to 0.19 and hope for the best.... May I know what is your library version?

Version: * matter-js 0.19.0 in UMD format

I've managed to resolve my issue now, I'm pretty sure the issue isn't caused by matter per-se or by bodies you've added to the system, more when applying changes to existing bodies, that are malformed changes.

In my case, when re-loading a file, the Body.setAngle() function was the root cause to this issue. Inside this function it recalculates the vertices, which I had passed a bad value to.

Good luck if it pops up, one recommendation I have is if it seems like all the bodies are fine, instead look at changes you're making to your bodies, angle, size etc.

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On another note it appears setAngle (and so I assume others) has no checks for any of the values passed and so no type safety there, in my case I passed NaN

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