From faea71172f0a13482d23861de0c53cf101b0d108 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dani=C3=ABl=20van=20Noord?=
 <13665637+DanielNoord@users.noreply.github.com>
Date: Sun, 30 Apr 2023 23:24:02 +0200
Subject: Allow passing ``UninferableBase`` to ``safe_infer``

---
 astroid/helpers.py    | 5 ++++-
 tests/test_helpers.py | 5 +++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/astroid/helpers.py b/astroid/helpers.py
index 63275813..d1ee215c 100644
--- a/astroid/helpers.py
+++ b/astroid/helpers.py
@@ -156,13 +156,16 @@ def object_issubclass(node, class_or_seq, context: InferenceContext | None = Non
 
 
 def safe_infer(
-    node: nodes.NodeNG | bases.Proxy, context: InferenceContext | None = None
+    node: nodes.NodeNG | bases.Proxy | util.UninferableBase,
+    context: InferenceContext | None = None,
 ) -> InferenceResult | None:
     """Return the inferred value for the given node.
 
     Return None if inference failed or if there is some ambiguity (more than
     one node has been inferred).
     """
+    if isinstance(node, util.UninferableBase):
+        return node
     try:
         inferit = node.infer(context=context)
         value = next(inferit)
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index 398ea1d3..5fdadc23 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -258,3 +258,8 @@ class TestHelpers(unittest.TestCase):
         builtin_type = self._extract("type")
         self.assertTrue(helpers.is_supertype(builtin_type, cls_a))
         self.assertTrue(helpers.is_subtype(cls_a, builtin_type))
+
+
+def test_uninferable_for_safe_infer() -> None:
+    uninfer = util.Uninferable
+    assert helpers.safe_infer(util.Uninferable) == uninfer
-- 
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