Do not crash with SyntaxError when parsing namedtuples with invalid label

Close pylint-dev/pylint#3549

Author: PCManticore

ChangeLog

@@ -19,6 +19,10 @@ Release Date: TBA
 
   Close #779
 
+* Do not crash with SyntaxError when parsing namedtuples with invalid label
+
+  Close PyCQA/pylint#3549
+
 
 What's New in astroid 2.4.0?
 ============================

astroid/brain/brain_namedtuple_enum.py

@@ -123,6 +123,8 @@ def infer_func_form(node, base_type, context=None, enum=False):
     except (AttributeError, exceptions.InferenceError):
         raise UseInferenceDefault()
 
+    attributes = [attr for attr in attributes if " " not in attr]
+
     # If we can't infer the name of the class, don't crash, up to this point
     # we know it is a namedtuple anyway.
     name = name or "Uninferable"

tests/unittest_brain.py

@@ -331,6 +331,18 @@ def test_namedtuple_bases_are_actually_names_not_nodes(self):
         self.assertIsInstance(inferred.bases[0], astroid.Name)
         self.assertEqual(inferred.bases[0].name, "tuple")
 
+    def test_invalid_label_does_not_crash_inference(self):
+        code = """
+        import collections
+        a = collections.namedtuple( 'a', ['b c'] )
+        a
+        """
+        node = builder.extract_node(code)
+        inferred = next(node.infer())
+        assert isinstance(inferred, astroid.ClassDef)
+        assert "b" not in inferred.locals
+        assert "c" not in inferred.locals
+
 
 class DefaultDictTest(unittest.TestCase):
     def test_1(self):