Odd scripting behavior, code execution just stops

Questions & Answers
1

I have the following simple script:

private IEnumerator queueAndCheckForMatch()
{
    _director.OnCheckForMatchSucceeded += (caller, queuedMatch) =>
    {
        if (queuedMatch != null)
        {
            _match = queuedMatch;

            _searchingForMatch = false;

            ShowMatchFound();
        }
    };

    _searchingForMatch = true;

    Debug.Log(string.Format("SearchingForMatch set to: {0}", _searchingForMatch));
    Debug.Log(string.Format("Party is null {0}", Party == null));

    if (Party != null)
    {
        Debug.Log(string.Format("SearchingForMatch at point of while start: {0}", _searchingForMatch));

        while (_searchingForMatch)
        {
            Debug.Log(string.Format("While entered: {0}", _searchingForMatch));

            yield return StartCoroutine(_director.CheckForMatch(Party.PartyId));

            Debug.Log(string.Format("Wait for seconds reached: {0}", _searchingForMatch));

            yield return new WaitForSeconds(1);

            Debug.Log(string.Format("Wait for seconds lapsed: {0}", _searchingForMatch));
        }
    }
}

All it does is make a call to a server to see if a match can be made between two opponents. If the server cannot make a match the script waits for one second and then tries again. If a match is found _searchingForMatch becomes false and it stops attempting to find a new match.

When I run this script it never makes it to the first yield statement. The output in the console shows only two debug messages. “SearchingForMatch set to: True” and “Party is null False”. That would tend to indicate it stops execution on this line:

if (Party != null)

And when I debug it the point of execution gets to the following line and then abruptly stops.

while (_searchingForMatch)

I’m at a bit of a loss and would appreciate any suggestions as to what the problem may be. This code worked just fine before I tried to make it check each second. The working code looked like this.

private IEnumerator queueAndCheckForMatch()
{
    _director.OnCheckForMatchSucceeded += (caller, queuedMatch) =>
    {
        if (queuedMatch != null)
        {
            _match = queuedMatch;

            ShowMatchFound();
        }
    };

    if (Party != null)
    {
        yield return StartCoroutine(_director.CheckForMatch(Party.PartyId));
    }
}
2

My bad, I allowed myself to get confused by the fact the debugger let me step all the way to the while loop. In fact Party was null all along and I was too busy looking somewhere else.