1 ride, probs not really. Shift under light loads and pre-empt downshifting before any large hills if you really want to make sure. Give the rings and chain a good wash aswell before the ride to get any abrasives off there.
I've been riding with a chain stretched well over 1mm (it sags so much it touches the stay un-tensioned in the 11t) for at least a month and it has hardly bothered the chainring at all. Obviously this isn't ideal, but I've not gotten round to changing it so started a how long can it last test.
Still ride 25+ miles a day with it, and not many issues.