unreachable executed error when using MultiBody joint with WASM

[HunterBarclay]

Description

I'm currently testing out Rapier inside of a react app using the @dimforge/rapier3d-compat (v^0.11.2) NPM package. I have a scene setup using impulse joints and when I swap the creation method for impulse joints out for multibody joint, I get an unreachable executed error some where in rapiers WASM code:

The line in question is a return statement with the new joint:

Any help would be greatly appreciated!

[HunterBarclay]

Here is the rest of the stack trace it shows me in the browser:

[MaxBittker]

did you figure this out?

[HunterBarclay]

@MaxBittker Nope. I isolated the issue to be something involving the borrow-checker, but was unable to see what I was doing wrong. I made my own WASM library for Rapier and that fixed it, but still ran into some other issues with static bodies and their behavior in MultiBody joints (which I believe is something wrong with the core library). My team ended up ditching Rapier altogether for JoltPhysicsJS.