Generic type resolution issue with method chaining when static return type breaks global generic parameter #12680

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1. kayw-geek commented on Mar 17, 2025

   

   kayw-geek

   on Mar 17, 2025

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   The bug looked is seem be resolve in latest version.
2. kayw-geek

   closed this as completedon Mar 17, 2025
3. ondrejmirtes commented on Mar 17, 2025

   

   ondrejmirtes

   on Mar 17, 2025

   Member

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   This isn't really fixed. I believe all the lines should say mixed: https://phpstan.org/r/c2b8d2e5-de05-4b8d-9d99-2e56e86edcb9

   👍React with 👍1Reacted by Kay W.
4. ondrejmirtes

   added

   bug

   on Mar 17, 2025
5. ondrejmirtes

   added this to the Generics milestone on Mar 17, 2025
6. ondrejmirtes

   reopened this on Mar 17, 2025
7. phpstan-bot commented on Mar 17, 2025

   

   phpstan-bot

   on Mar 17, 2025

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   @kayw-geek After the latest push in 2.1.x, PHPStan now reports different result with your code snippet:

   @@ @@
    28: Dumped type: TValue (class Collection, parameter)
   -30: Dumped type: mixed
   +30: Dumped type: TValue (class Collection, parameter)

   Full report

   Line	Error
   28	Dumped type: TValue (class Collection, parameter)
   30	Dumped type: TValue (class Collection, parameter)
8. staabm

   closed this as completedin phpstan-src#6695on Oct 23, 2026