gh-137191: Fix how type parameters are collected from Protocol and Generic bases with parameters (#137281)

Doc/whatsnew/3.15.rst

@@ -477,6 +477,15 @@ typing
   or ``TD = TypedDict("TD", {})`` instead.
   (Contributed by Bénédikt Tran in :gh:`133823`.)
 
+* Code like ``class ExtraTypeVars(P1[S], Protocol[T, T2]): ...`` now raises
+  a :exc:`TypeError`, because ``S`` is not listed in ``Protocol`` parameters.
+  (Contributed by Nikita Sobolev in :gh:`137191`.)
+
+* Code like ``class B2(A[T2], Protocol[T1, T2]): ...`` now correctly handles
+  type parameters order: it is ``(T1, T2)``, not ``(T2, T1)``
+  as it was incorrectly infered in runtime before.
+  (Contributed by Nikita Sobolev in :gh:`137191`.)
+
 
 wave
 ----