Fix crash involving non-standard type comments (#1753)

ChangeLog

@@ -17,6 +17,9 @@ What's New in astroid 2.12.4?
 =============================
 Release date: TBA
 
+* Fixed a crash involving non-standard type comments such as ``# type: # any comment``.
+
+  Refs PyCQA/pylint#7347
 
 
 What's New in astroid 2.12.3?

astroid/rebuilder.py

@@ -734,6 +734,11 @@ def check_type_comment(
             # Invalid type comment, just skip it.
             return None
 
+        # For '# type: # any comment' ast.parse returns a Module node,
+        # without any nodes in the body.
+        if not type_comment_ast.body:
+            return None
+
         type_object = self.visit(type_comment_ast.body[0], parent=parent)
         if not isinstance(type_object, nodes.Expr):
             return None

tests/unittest_builder.py

@@ -737,6 +737,14 @@ def test_not_implemented(self) -> None:
         self.assertIsInstance(inferred, nodes.Const)
         self.assertEqual(inferred.value, NotImplemented)
 
+    def test_type_comments_without_content(self) -> None:
+        node = builder.parse(
+            """
+            a = 1 # type: # any comment
+        """
+        )
+        assert node
+
 
 class FileBuildTest(unittest.TestCase):
     def setUp(self) -> None: