RSS Feed/News XF\Mvc\Entity\Manager\getFinder does not reliably return the same type depending on class extensions

[ENXF NET]

XenForo's dynamically creates finders of a given base-type if they are extended or otherwise will return a \XF\Mvc\Entity\Finder instance.

The problem is when return and parameter arguments are narrower than the \XF\Mvc\Entity\Finder and will cause a type error violation.

• XenForo does not define XF\Finder\Warning
• Add-on A extended XF\Finder\Warning
• Add-on B has a return type hint of XF\Finder\Warning
• Add-on...

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