python
diff --git a/‎Lib/test/test_listcomps.py
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+17Lines changed: 17 additions & 0 deletions b/‎Lib/test/test_listcomps.py
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diff --git a/‎Misc/NEWS.d/next/Core_and_Builtins/2025-03-04-12-52-21.gh-issue-130809.fSXq60.rst
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diff --git a/‎Objects/frameobject.c
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+3Lines changed: 3 additions & 0 deletions b/‎Objects/frameobject.c
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+3Lines changed: 3 additions & 0 deletions
@@ -709,6 +709,23 @@ def test_multiple_comprehension_name_reuse(self):
         self._check_in_scopes(code, {"x": 2, "y": [3]}, ns={"x": 3}, scopes=["class"])
         self._check_in_scopes(code, {"x": 2, "y": [2]}, ns={"x": 3}, scopes=["function", "module"])
 
+    def test_name_collision_locals(self):
+        # GH-130809: The existence of a hidden fast from list comprehension
+        # should not cause frame.f_locals on module level to return a new dict
+        # every time it is accessed.
+
+        code = """
+            import sys
+            frame = sys._getframe()
+            f_locals = frame.f_locals
+            foo = 1
+            [foo for foo in [0]]
+            # calls _PyFrame_LocalsToFast which triggers the issue
+            from abc import *
+            same_f_locals = frame.f_locals is f_locals
+        """
+        self._check_in_scopes(code, {"foo": 1, "same_f_locals": True}, scopes=["module"])
+
     def test_exception_locations(self):
         # The location of an exception raised from __init__ or
         # __next__ should should be the iterator expression
 
@@ -0,0 +1,2 @@
+Fixed an issue where ``_PyFrame_LocalsToFast`` tries to write module level
+values to hidden fasts.
@@ -1405,6 +1405,9 @@ _PyFrame_LocalsToFast(_PyInterpreterFrame *frame, int clear)
         if (kind & CO_FAST_FREE && !(co->co_flags & CO_OPTIMIZED)) {
             continue;
         }
+        if (kind & CO_FAST_HIDDEN) {
+            continue;
+        }
         PyObject *name = PyTuple_GET_ITEM(co->co_localsplusnames, i);
         PyObject *value = PyObject_GetItem(locals, name);
         /* We only care about NULLs if clear is true. */
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Fixed an issue where ``_PyFrame_LocalsToFast`` tries to write module level
	`2`	`+values to hidden fasts.`