Unwind error in game

Please include the following in your bug report:

**Version of emscripten/emsdk:**
3.1

My simple game is throwing:
```
Uncaught (in promise) unwind
```

There is a code in generate .js file:

```
if (simulateInfiniteLoop) {
throw "unwind"
}
```


Demo:
https://nativium.s3.amazonaws.com/game/1.0.0/index.html

This only happen when i start the game from function `Game.Core.Initialize(640, 640, 1);`. If i let it from `main` function, no error happen.

What im doing wrong?

Thanks.