https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-20843

--- expat-2.1.0/lib/xmlparse.c.cve20843
+++ expat-2.1.0/lib/xmlparse.c
@@ -5433,7 +5433,7 @@
       else
         poolDiscard(&dtd->pool);
       elementType->prefix = prefix;
-
+      break;
     }
   }
   return 1;