Indeed, and that’s how I found some of the bugs I filed last year when I reported that the Statistics standard library returns incorrect quantiles for floating-point and integer arrays.
It’s also how I noticed that some of Julia’s functions for floating-point division return the wrong answer – the one that’s supposed to return the floor (fld) sometimes returns the ceiling, and the one that’s supposed to return the ceiling (cld) sometimes returns the floor.
There’s often a burst of attention after a serious-looking issue gets filed or when a link is posted in a particularly visible place.