Revert "WIP 2"

Author: cdce8p

mypy/expandtype.py

@@ -241,14 +241,6 @@ def visit_type_var(self, t: TypeVarType) -> Type:
     def visit_param_spec(self, t: ParamSpecType) -> Type:
         # Set prefix to something empty, so we don't duplicate it below.
         repl = self.variables.get(t.id, t.copy_modified(prefix=Parameters([], [], [])))
-        if isinstance(repl, ParamSpecType):
-            if (tvar_id := repl.id) in self.recursive_tvar_guard:
-                return self.recursive_tvar_guard[tvar_id] or repl
-            self.recursive_tvar_guard[tvar_id] = None
-            repl = repl.accept(self)
-            if isinstance(repl, ParamSpecType):
-                repl.default = repl.default.accept(self)
-            self.recursive_tvar_guard[tvar_id] = repl
         if isinstance(repl, ParamSpecType):
             return repl.copy_modified(
                 flavor=t.flavor,

test-data/unit/check-typevar-defaults.test

@@ -512,32 +512,6 @@ def func_d3(
     m = ClassD3[int, float]()
     reveal_type(m)  # N: Revealed type is "__main__.ClassD3[builtins.int, builtins.float]"
 
-[case testTypeVarDefaultsClassRecursive2]
-# flags: --disallow-any-generics
-from typing import Generic, ParamSpec
-
-P1 = ParamSpec("P1", default=[int, str])
-P2 = ParamSpec("P2", default=P1)
-P3 = ParamSpec("P3")
-
-class ClassE1(Generic[P1, P2]): ...
-
-def func_e1(
-    a: ClassE1,
-    b: ClassE1[[float]],
-    c: ClassE1[[float], [str]],
-) -> None:
-    reveal_type(a)  # N: Revealed type is "__main__.ClassE1[[builtins.int, builtins.str], [builtins.int, builtins.str]]"
-    reveal_type(b)  # N: Revealed type is "__main__.ClassE1[[builtins.float], [builtins.float]]"
-    reveal_type(c)  # N: Revealed type is "__main__.ClassE1[[builtins.float], [builtins.str]]"
-
-    k = ClassE1()
-    # reveal_type(k)  # Revealed type is "__main__.ClassE1[[builtins.int, builtins.str], [builtins.int, builtins.str]]"  # TODO
-    l = ClassE1[[float]]()
-    reveal_type(l)  # N: Revealed type is "__main__.ClassE1[[builtins.float], [builtins.float]]"
-    m = ClassE1[[float], [str]]()
-    reveal_type(m)  # N: Revealed type is "__main__.ClassE1[[builtins.float], [builtins.str]]"
-
 [case testTypeVarDefaultsClassRecursiveMultipleFiles]
 # flags: --disallow-any-generics
 from typing import Generic, TypeVar