#1434090: properly append child in expatbuilder doctype handler.

diff --git a/Lib/xml/dom/expatbuilder.py b/Lib/xml/dom/expatbuilder.py
index a5354b93514358069570fb1e43fa763b5b19c9b4..a98fe03235ea80dbbf3ade2d1574f5101133f83a 100644 (file)
--- a/Lib/xml/dom/expatbuilder.py
+++ b/Lib/xml/dom/expatbuilder.py
@@ -242,7 +242,7 @@ class ExpatBuilder:
         doctype = self.document.implementation.createDocumentType(
             doctypeName, publicId, systemId)
         doctype.ownerDocument = self.document
-        self.document.childNodes.append(doctype)
+        _append_child(self.document, doctype)
         self.document.doctype = doctype
         if self._filter and self._filter.acceptNode(doctype) == FILTER_REJECT:
             self.document.doctype = None