lib/nanoc/helpers/html_escape.rb in nanoc-4.1.6 vs lib/nanoc/helpers/html_escape.rb in nanoc-4.2.0b1

@@ -32,9 +32,14 @@
 
         # Append filtered data to buffer
         buffer = eval('_erbout', block.binding)
         buffer << escaped_data
       elsif string
+        unless string.is_a? String
+          raise ArgumentError, 'The #html_escape or #h function needs either a ' \
+            "string or a block to HTML-escape, but #{string.class} was given"
+        end
+
         string
           .gsub('&', '&amp;')
           .gsub('<', '&lt;')
           .gsub('>', '&gt;')
           .gsub('"', '&quot;')