Fix a crash involving Uninferable args to namedtuple (#1763)

ChangeLog

@@ -17,7 +17,9 @@ What's New in astroid 2.12.6?
 =============================
 Release date: TBA
 
+* Fix a crash involving ``Uninferable`` arguments to ``namedtuple()``.
 
+  Closes PyCQA/pylint#7375
 
 
 What's New in astroid 2.12.5?

astroid/brain/brain_namedtuple_enum.py

@@ -538,7 +538,13 @@ def _get_namedtuple_fields(node: nodes.Call) -> str:
     extract a node from them later on.
     """
     names = []
-    for elt in next(node.args[1].infer()).elts:
+    try:
+        container = next(node.args[1].infer())
+    except (InferenceError, StopIteration) as exc:
+        raise UseInferenceDefault from exc
+    if not isinstance(container, nodes.BaseContainer):
+        raise UseInferenceDefault
+    for elt in container.elts:
         if isinstance(elt, nodes.Const):
             names.append(elt.as_string())
             continue

tests/unittest_brain.py

@@ -18,6 +18,7 @@
 import astroid
 from astroid import MANAGER, bases, builder, nodes, objects, test_utils, util
 from astroid.bases import Instance
+from astroid.brain.brain_namedtuple_enum import _get_namedtuple_fields
 from astroid.const import PY39_PLUS
 from astroid.exceptions import (
     AttributeInferenceError,
@@ -1644,6 +1645,25 @@ def NamedTuple():
         )
         next(node.infer())
 
+    def test_namedtuple_uninferable_member(self) -> None:
+        call = builder.extract_node(
+            """
+        from typing import namedtuple
+        namedtuple('uninf', {x: x for x in range(0)})  #@"""
+        )
+        with pytest.raises(UseInferenceDefault):
+            _get_namedtuple_fields(call)
+
+        call = builder.extract_node(
+            """
+        from typing import namedtuple
+        uninferable = {x: x for x in range(0)}
+        namedtuple('uninferable', uninferable)  #@
+        """
+        )
+        with pytest.raises(UseInferenceDefault):
+            _get_namedtuple_fields(call)
+
     def test_typing_types(self) -> None:
         ast_nodes = builder.extract_node(
             """