1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/sys/common/backtrace.rs b/src/libstd/sys/common/backtrace.rs
index 9b53ebf70a0..c3e12586829 100644
--- a/src/libstd/sys/common/backtrace.rs
+++ b/src/libstd/sys/common/backtrace.rs
@@ -94,7 +94,7 @@ pub fn demangle(writer: &mut Writer, s: &str) -> IoResult<()> {
                         ($($pat:expr, => $demangled:expr),*) => ({
                             $(if rest.starts_with($pat) {
                                 try!(writer.write_str($demangled));
-                                rest = rest.slice_from($pat.len());
+                                rest = &rest[$pat.len()..];
                               } else)*
                             {
                                 try!(writer.write_str(rest));