From 309ca8dd7b4d0c95cb3cbb25180857f44050b672 Mon Sep 17 00:00:00 2001
From: Jacob Walls <jacobtylerwalls@gmail.com>
Date: Sat, 15 Apr 2023 15:26:51 -0400
Subject: [PATCH] Fix infer_call_result() crash on methods called
 with_metaclass() (#2118)

---
 ChangeLog                                  |  3 +++
 astroid/nodes/scoped_nodes/scoped_nodes.py | 10 +++++++++-
 tests/test_inference.py                    |  5 +++++
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 5b35cfdf6c..a9b26f1386 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,9 @@ What's New in astroid 2.15.3?
 =============================
 Release date: TBA
 
+* Fix ``infer_call_result()`` crash on methods called ``with_metaclass()``.
+
+  Closes #1735
 
 
 What's New in astroid 2.15.2?
diff --git a/astroid/nodes/scoped_nodes/scoped_nodes.py b/astroid/nodes/scoped_nodes/scoped_nodes.py
index 530d9e6d34..5945f05de2 100644
--- a/astroid/nodes/scoped_nodes/scoped_nodes.py
+++ b/astroid/nodes/scoped_nodes/scoped_nodes.py
@@ -1697,10 +1697,18 @@ def infer_call_result(self, caller=None, context: InferenceContext | None = None
         # generators, and filter it out later.
         if (
             self.name == "with_metaclass"
+            and caller is not None
             and len(self.args.args) == 1
             and self.args.vararg is not None
         ):
-            metaclass = next(caller.args[0].infer(context), None)
+            if isinstance(caller.args, Arguments):
+                metaclass = next(caller.args.args[0].infer(context), None)
+            elif isinstance(caller.args, list):
+                metaclass = next(caller.args[0].infer(context), None)
+            else:
+                raise TypeError(  # pragma: no cover
+                    f"caller.args was neither Arguments nor list; got {type(caller.args)}"
+                )
             if isinstance(metaclass, ClassDef):
                 try:
                     class_bases = [
diff --git a/tests/test_inference.py b/tests/test_inference.py
index ef99e03136..86fdbcf4ae 100644
--- a/tests/test_inference.py
+++ b/tests/test_inference.py
@@ -4048,6 +4048,11 @@ class C:
             inferred = next(node.infer())
             self.assertRaises(InferenceError, next, inferred.infer_call_result(node))
 
+    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))
+        self.assertIsInstance(inferred, nodes.Const)
+
     def test_context_call_for_context_managers(self) -> None:
         ast_nodes = extract_node(
             """