From the report, it seems the problem is that they added a feature that could use 21 arguments, but there was only enough space for 20. Until now, no configurat

From the report, it seems the problem is that they added a feature that could use 21 arguments, but there was only enough space for 20. Until now, no configuration used all 21 (the last one was a wildcard regex, which apparently didn't count), but when they finally did, it caused a buffer overflow and crashed.