Index: lib/cgi.rb
===================================================================
--- lib/cgi.rb	(Revision 17992)
+++ lib/cgi.rb	(Arbeitskopie)
@@ -1257,11 +1257,11 @@
       s = <<-END
           "<#{element.upcase}" + attributes.collect{|name, value|
             next unless value
-            " " + CGI::escapeHTML(name) +
+            " " + CGI::escapeHTML(name.to_s) +
             if true == value
               ""
             else
-              '="' + CGI::escapeHTML(value) + '"'
+              '="' + CGI::escapeHTML(value.to_s) + '"'
             end
           }.to_s + ">"
       END