error message: "multiple filter chains with the same matching rules are defined" is hard to debug in large filters without context

Its (unfortunately) not uncommon for us to run across bugs resulting in "multiple filter chains with the same matching rules are defined". These are pretty hard to debug when we have 100s of filter chains. It would be useful to get some sort of indication about which filter chain is duplicated, whether its the index of the filter chain or some other identifier.