Artist duplicate directory detection kinda broken?

[towerofnix]

Given these artists...

Artist: Doctor Chaos
---
Artist: Rom M
Aliases:
- Doctor Chaos

...you'd expect some kind of directory error, but none is showing up! Very strange.

[towerofnix]

Possibly related to #340.

[towerofnix]

not sure this is a problem, or working differently than intended? although artists and artist aliases occupy the same directory space, artists always take priority. this was ensured recently in #544 / #543, but was always the intention.

it does raise a question about handling of directories and redirects / link permanence in general, but this is a broader subject along lines of #102. ("if an alias used to exist that enabled redirecting from /artist/radiation/ to /artist/toby-fox/, and then an artist named radiation newly existed and overwrote /artist/radiation/, is it acceptable that old links are broken - now pointing to a different result than the artist formerly known as radiation, now toby fox? if not, what do we do?")