Fix RecursionError in infer_call_result() (#2432)

Author: jacobtylerwalls

ChangeLog

@@ -13,6 +13,9 @@ What's New in astroid 3.2.1?
 ============================
 Release date: TBA
 
+* Fix ``RecursionError`` in ``infer_call_result()`` for certain ``__call__`` methods.
+
+  Closes pylint-dev/pylint#9139
 
 
 What's New in astroid 3.2.0?

astroid/bases.py

@@ -326,6 +326,11 @@ def infer_call_result(
         for node in self._proxied.igetattr("__call__", context):
             if isinstance(node, UninferableBase) or not node.callable():
                 continue
+            if isinstance(node, BaseInstance) and node._proxied is self._proxied:
+                inferred = True
+                yield node
+                # Prevent recursion.
+                continue
             for res in node.infer_call_result(caller, context):
                 inferred = True
                 yield res

tests/test_inference.py

@@ -4090,6 +4090,18 @@ class C:
             inferred = next(node.infer())
             self.assertRaises(InferenceError, next, inferred.infer_call_result(node))
 
+    def test_infer_call_result_same_proxied_class(self) -> None:
+        node = extract_node(
+            """
+        class A:
+            __call__ = A()
+        A() #@
+        """
+        )
+        inferred = next(node.infer())
+        fully_evaluated_inference_results = list(inferred.infer_call_result(node))
+        assert fully_evaluated_inference_results[0].name == "A"
+
     def test_infer_call_result_with_metaclass(self) -> None:
         node = extract_node("def with_metaclass(meta, *bases): return 42")
         inferred = next(node.infer_call_result(caller=node))