Fix tree root detection

Fix #242.
Kozea · May 31, 2019 · e4c2365 · e4c2365
1 parent bcc808e
commit e4c2365
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/cairosvg/parser.py b/cairosvg/parser.py
@@ -393,7 +393,7 @@ def __init__(self, **kwargs):
             (url and url.startswith('#') and not self.url))
         if self_is_parent:
             root_parent = parent
-            while root_parent.parent:
+            while root_parent.parent is not None:
                 root_parent = root_parent.parent
             tree = root_parent.xml_tree
         else: