On Sun, 2 Sep 2018, 14:46 Jeff Donner, <jeffrey.donner@xxxxxxxxx> wrote: > Hi - I thought bugs were added to the test suite, and so, regressions > should never occur. How is this understanding wrong and why isn't it this > way? > Not all regressions are recurring bugs that have already been fixed. Anything that used to work and then stops working is a regression. If the thing that worked wasn't covered by any test in the testsuite the regression goes unnoticed.