1 files changed, 3 insertions, 3 deletions
diff --git a/src/libsyntax/diagnostics/plugin.rs b/src/libsyntax/diagnostics/plugin.rs
index bcce5538314..90fc28014e6 100644
--- a/src/libsyntax/diagnostics/plugin.rs
+++ b/src/libsyntax/diagnostics/plugin.rs
@@ -58,7 +58,7 @@ pub fn expand_diagnostic_used<'cx>(ecx: &'cx mut ExtCtxt,
             Some(previous_span) => {
                 ecx.span_warn(span, format!(
                     "diagnostic code {} already used", token::get_ident(code).get()
-                ).as_slice());
+                )[]);
                 ecx.span_note(previous_span, "previous invocation");
             },
             None => ()
@@ -87,12 +87,12 @@ pub fn expand_register_diagnostic<'cx>(ecx: &'cx mut ExtCtxt,
         if diagnostics.insert(code.name, description).is_some() {
             ecx.span_err(span, format!(
                 "diagnostic code {} already registered", token::get_ident(*code).get()
-            ).as_slice());
+            )[]);
         }
     });
     let sym = Ident::new(token::gensym((
         "__register_diagnostic_".to_string() + token::get_ident(*code).get()
-    ).as_slice()));
+    )[]));
     MacItems::new(vec![quote_item!(ecx, mod $sym {}).unwrap()].into_iter())
 }