Don't allow newtype structs to be dereferenced. #6246

src/librustdoc/html/escape.rs

@@ -23,6 +23,7 @@ impl<'a> fmt::Default for Escape<'a> {
     fn fmt(s: &Escape<'a>, fmt: &mut fmt::Formatter) {
         // Because the internet is always right, turns out there's not that many
         // characters to escape: http://stackoverflow.com/questions/7381974
+        let Escape(s) = *s;
         let pile_o_bits = s.as_slice();
         let mut last = 0;
         for (i, ch) in s.bytes().enumerate() {