I would be really peeved but I would agree with the rest of the team here and toss it out. I might give it the sniff test but even if it passed, I'd be very twitchy about it. That whole thing about "brewers make wort, yeast makes beer" makes me have A LOT of respect for yeast and what it does for us. It seems mysterious (to me) because we don't really know how healthy it is, how many viable cells there are, whether it's contaminated, whether it's slightly morphed into something we don't want, etc. I don't know about you guys but I don't have a yeast lab in my home. So I treat the yeast as well as I know how, I go through some measures to make sure any storage vessels for yeast are as clean as the can be, etc. There are times when I harvest yeast and take a sniff and I am mildly put off by its aroma. Then I use it and the resulting beer is very good. As far as all of the processes you go through to make beer, yeast is by far the one I feel the most-distant from and in the least control of.