Under the hood
Useful1 Signal0
Plugin hook registration was rewritten as a class; duplicate registrations still error.
What's wrong with this entry?
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What
The code that registers plugin hooks was rewritten from closures into a class-based registrar. The same errors still fire when a hook or a catch-all handler is registered twice.
Evidence
on("*") registered twice
Strings lifted out of the shipped bundle, so the claim above can be checked against them.