Getting [Vue Router warn]: Finding ancestor route "/messages" failed for "/messages" after upgrading to 4.3.3

[martsyn]

After the upgrade to 4.3.3 with the switch to binary search for insertMatcher (#2137) by @skirtles-code I am getting three of messages like this in dev console:

[Vue Router warn]: Finding ancestor route "/messages" failed for "/messages"

I have a big project with a lot of routes (plenty of nested routes and such) and having trouble replicating this in a smaller project. If I remove some random routes before the ones that show up in warnings, these warnings still show up with other routes. This and the fact that this warning has a comment // This should never happen before it in new function findInsertionIndex baffles me.

Would be happy if someone helps me out here or points me in the right direction to replicate this issue so I can understand what's wrong with my route setup or file a proper bug report. Unfortunately, sharing my project in its existing state is not very feasible.

[skirtles-code]

Could it be the same problem as #2266? That was caused by having two routes with the same name, with one being a descendant of the other.

There's a pending PR, #2267, that is intended to help identify this problem.

[martsyn]

This indeed was the case of name duplicated both on parent and child. Thank you!