A way to catch exception

Hi, I am using emsdk 2.0.8 and having hard times to catch exception in my javascript code, in order to be able to detect it other way then having dev tools console open.

My code:

```
const core = await create(...)
const main = core.cwrap('proxy_main', 'number', [...]);
main(...);
```

exception thrown in console:

```
Uncaught RangeError: Invalid atomic access index
at Atomics.store ()
at spawnThread (core.js:9)
at _pthread_create (core.js:9)
at :8080/src/test/resources/:wasm-function[6114]:0x546c48
at ne (:8080/src/test/resources/:wasm-function[3110]:0x276730)
at me (:8080/src/test/resources/:wasm-function[3955]:0x3504ca)
at Worker.worker.onmessage (core.js:9)
```

even having `main(...)` wrapped inside `try-catch` block, I am still unable to catch the exception in my javascript code.

At this point I am not looking for a solution to resolve the exception, but a way how to catch it.

Is there an official way? Maybe I just missed some part of documentation. Thanks.