[Issue 13179] AA key type TagIndex now requires equality rather than comparison

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13179

--- Comment #24 from hst...@quickfur.ath.cx ---
Found it with git bisect: it's caused by dmd commit
11a29600c94a599ea670c8ba1a134a6ea5bcf491, which was merged by PR 3731.

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