Try-Catch Async Exceptions

This example "fails":

static async void Main(string[] args)
{
    try
    {
        await TaskEx.Run(() => { throw new Exception("failure"); });
    }
    catch (Exception)
    {
        throw new Exception("success");
    }
}

That is, the exception with the text "failure" bubbles up.

Then I tried this workaround:

static async void Main(string[] args)
{
    try
    {
        await SafeRun(() => { throw new Exception("failure"); });
    }
    catch (Exception)
    {
        throw new Exception("success");
    }
}

static async Task SafeRun(Action action)
{
    var ex = default(Exception);
    await TaskEx.Run(() =>
    {
        try
        {
            action();
        }
        catch (Exception _)
        {
            ex = _;
        }
    });
    if (ex != default(Exception))
        throw ex;
}

That didn't help either.

I suppose my Async CTP refresh installation could be hosed.

Should this code work as I expect ("success" bubbles up, not "failure"), or is this not "supposed" to work that way. And if not, how would you work around it?