From b6b8880f0ec3f057dc56320f6886be173a8f0d8e Mon Sep 17 00:00:00 2001
From: Ryan Levick <ryan@6wunderkinder.com>
Date: Sun, 18 Jan 2015 00:49:50 +0100
Subject: [PATCH] Improve the error message when source file cannot be read

Contribution from @look!
---
 src/libsyntax/parse/mod.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index f1f547ba0c7dd..10fb0a73cec7b 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -253,9 +253,10 @@ pub fn file_to_filemap(sess: &ParseSess, path: &Path, spanopt: Option<Span>)
     let bytes = match File::open(path).read_to_end() {
         Ok(bytes) => bytes,
         Err(e) => {
-            err(&format!("couldn't read {:?}: {:?}",
+            let error_msg = e.desc;
+            err(&format!("couldn't read {:?}: {}",
                         path.display(),
-                        e)[]);
+                        error_msg)[]);
             unreachable!()
         }
     };