Tenuous first fix

Need to switch machines to test on Linux

Author: abstractedfox

Lib/xml/etree/ElementTree.py

@@ -528,6 +528,9 @@ class ElementTree:
     """
     def __init__(self, element=None, file=None):
         # assert element is None or iselement(element)
+        if element is not None and not iselement(element):
+            raise TypeError(f"element must be etree.Element, "
+                            f"not {type(element).__name__}")
         self._root = element # first node
         if file:
             self.parse(file)
@@ -544,6 +547,8 @@ def _setroot(self, element):
 
         """
         # assert iselement(element)
+        if not iselement(element):
+            raise TypeError
         self._root = element
 
     def parse(self, source, parser=None):