Uncatchable exception in GCPFunction.wrapHttpFunction

[mrexox]

After the upgrade from a quite stale version of @sentry/serverless I noticed that I can't catch the exceptions from my cloud functions in tests. I've read through the sources and found the following code:

https://github.com/getsentry/sentry-javascript/blob/7.87.0/packages/serverless/src/gcpfunction/http.ts#L130-L137

    if (isThenable(fnResult)) {
      fnResult.then(null, err => {
        captureException(err, scope => markEventUnhandled(scope));
        throw err;
      });
    }

    return fnResult;

As I understand, this then(...) throws an error that can't be catched by the caller because it is handled in a different step of an event loop. Does it look like a bug? Wouldn't it be better to return on line 131?