# HG changeset patch
# User hodgestar
# Date 1371502341 0
# Node ID cdb5d435d2372cb89126219f91f329c9c00e6429
# Parent  d13802b8c7ccac786cbd51152e33e67abe995d91
Fix assert with side-effect in xi:fallback directive processing (see #565).

diff --git a/genshi/template/markup.py b/genshi/template/markup.py
--- a/genshi/template/markup.py
+++ b/genshi/template/markup.py
@@ -230,7 +230,8 @@
 
             elif kind is END:
                 if fallbacks and data == xinclude_ns['fallback']:
-                    assert streams.pop() is fallbacks[-1]
+                    fallback_stream = streams.pop()
+                    assert fallback_stream is fallbacks[-1]
                 elif data == xinclude_ns['include']:
                     fallback = None
                     if len(fallbacks) == len(includes):