--- a/include/orcus/sax_parser.hpp	2022-03-30 10:54:44.043568760 +0100
+++ b/include/orcus/sax_parser.hpp	2022-03-30 10:54:55.645037322 +0100
@@ -547,7 +547,7 @@
 
     skip_space_and_control();
 
-    char c = cur_char();
+    char c = cur_char_checked();
     if (c != '=')
     {
         std::ostringstream os;