From 196b0cf25532e36cfbd8194a0659dba65d2db9ac Mon Sep 17 00:00:00 2001
From: Liigo Zhuang <liigo@qq.com>
Date: Fri, 17 Jun 2016 15:45:09 +0800
Subject: [PATCH] Pretty print error value on Result.unwrap() panic

Old (one long line, hard to read):
```
thread '<main>' panicked at 'called `Result::unwrap()` on an `Err` value: Error { repr: Os { code: 2, message: "No such file or directory" } }', ../src/libcore/result.rs:746
```

New (pretty readable):
```
thread '<main>' panicked at 'called `Result::unwrap()` on an `Err` value: Error {
    repr: Os {
        code: 2,
        message: "No such file or directory"
    }
}', ../src/libcore/result.rs:746
```
---
 src/libcore/result.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index 4d9f042fddedc..64fa93381449f 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -782,7 +782,7 @@ impl<T: fmt::Debug, E> Result<T, E> {
 #[inline(never)]
 #[cold]
 fn unwrap_failed<E: fmt::Debug>(msg: &str, error: E) -> ! {
-    panic!("{}: {:?}", msg, error)
+    panic!("{}: {:#?}", msg, error)
 }
 
 /////////////////////////////////////////////////////////////////////////////