prevent infinite loop on info

asdf/_node_info.py

@@ -2,7 +2,7 @@
 from collections import namedtuple
 
 from .schema import load_schema
-from .treeutil import get_children
+from .treeutil import get_children, is_container
 
 
 def _filter_tree(info, filters):
@@ -273,7 +273,7 @@ def from_root_node(
             next_nodes = []
 
             for parent, identifier, node in current_nodes:
-                if (isinstance(node, (dict, tuple)) or _traversable(node, extension_manager)) and id(node) in seen:
+                if (is_container(node) or _traversable(node, extension_manager)) and id(node) in seen:
                     info = NodeSchemaInfo(
                         key,
                         parent,

asdf/_tests/test_info.py

@@ -732,3 +732,16 @@ def __asdf_traverse__(self):
 
     captured = capsys.readouterr()
     assert "sentinel" in captured.out
+
+
+def test_info_no_infinite_loop(capsys):
+    """
+    Providing a recursive list used to cause an
+    infinite loop. Test this is not the case.
+    """
+    af = asdf.AsdfFile()
+    af["l"] = []
+    af["l"].append(af["l"])
+    af.info()
+    captured = capsys.readouterr()
+    assert "recursive" in captured.out