python · Fidget-Spinner · Feb 19, 2026 · Feb 19, 2026 · Feb 19, 2026 · Feb 19, 2026
diff --git a/Include/internal/pycore_opcode_metadata.h b/Include/internal/pycore_opcode_metadata.h
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-19-19-23-12.gh-issue-145008.tHYQv6.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-19-19-23-12.gh-issue-145008.tHYQv6.rst
@@ -0,0 +1 @@
+Fix a bug when calling certain methods at the recursion limit which manifested as a corruption of Python's operand stack. Patch by Ken Jin.
@@ -3241,9 +3241,11 @@ dummy_func(
         macro(CALL_BOUND_METHOD_GENERAL) =
             unused/1 + // Skip over the counter
             _CHECK_PEP_523 +
+            // gh-145008: We must check recursion before expanding method,
+            // otherwise we may leave the stack in an inconsistent state in 3.13.
+            _CHECK_RECURSION_REMAINING +
             _CHECK_METHOD_VERSION +
             _EXPAND_METHOD +
-            _CHECK_RECURSION_REMAINING +
             _PY_FRAME_GENERAL +
             _SAVE_RETURN_OFFSET +
             _PUSH_FRAME;

diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Fix a bug when calling certain methods at the recursion limit which manifested as a corruption of Python's operand stack. Patch by Ken Jin.