1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/failure.rs b/src/libstd/failure.rs
index e48137047b0..50538d3e43d 100644
--- a/src/libstd/failure.rs
+++ b/src/libstd/failure.rs
@@ -37,7 +37,7 @@ pub fn on_fail(obj: &(Any+Send), file: &'static str, line: uint) {
     let msg = match obj.downcast_ref::<&'static str>() {
         Some(s) => *s,
         None => match obj.downcast_ref::<String>() {
-            Some(s) => s[],
+            Some(s) => s.index(&FullRange),
             None => "Box<Any>",
         }
     };