A program generator creates programs that are more "buggy" than the program generator.

A program generator creates programs that are more "buggy" than the program generator. *
After having played (and not done any serious work) with something called BrightSword and seen others (who actually had to do some serious work) struggle with the bugs it generates, I can surely vouch for that.

* The quote was from Murphy's Computer Law + others at CodeProject