From e8b151b79133843a0098ad2ff9d7f577c96e081e Mon Sep 17 00:00:00 2001
From: Steven Fackler <sfackler@gmail.com>
Date: Wed, 24 Dec 2014 21:40:56 -0500
Subject: [PATCH] Fix backtrace demangling

Closes #20209
---
 src/libstd/sys/common/backtrace.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/libstd/sys/common/backtrace.rs b/src/libstd/sys/common/backtrace.rs
index 1d646eb06b167..866bf1d8a7d63 100644
--- a/src/libstd/sys/common/backtrace.rs
+++ b/src/libstd/sys/common/backtrace.rs
@@ -115,10 +115,10 @@ pub fn demangle(writer: &mut Writer, s: &str) -> IoResult<()> {
 
                         // in theory we can demangle any Unicode code point, but
                         // for simplicity we just catch the common ones.
-                        "$x20" => " ",
-                        "$x27" => "'",
-                        "$x5b" => "[",
-                        "$x5d" => "]"
+                        "$u{20}" => " ",
+                        "$u{27}" => "'",
+                        "$u{5b}" => "[",
+                        "$u{5d}" => "]"
                     )
                 } else {
                     let idx = match rest.find('$') {