This patch fixes a bug where the nth function wasn't iterating properly. The assert.second test was passing because the function passed to do the assertion was never called.
Coverage remained the same when pulling c1d079f9b3fd502019ca4f4ff8b279e18eaaee0e on coen-hyde:nth-fix into 78ffc5ce79aa0cfc757096b96c80a5e4b68dc093 on floatdrop:master.
This patch fixes a bug where the nth function wasn't iterating properly. The assert.second test was passing because the function passed to do the assertion was never called.