(maybe) await in catch/finally -- new language feature (test case available)

[goojal]

When there is await in catch or finally clauses, in IL we can see compiler takes await out of catch clause and skips it if we never been in catch. And the flag is just a local variable so we don't see this block as a candidate of state controller block.
The reason we might not want to look for this pattern is the test shown below will result in exact same IL. So there is more than one way to generate same state machine.

        private static async Task AwaitInCatchV2()
        {
            int num = 0;
            try
            {
                Console.WriteLine("asd");
            }
            catch
            {
                num = 1;
            }
            if (num == 1)
            {
                await Task.Delay(5);
            }
        }