From 4df0f3f6a607a16def813ca6f7cf04d05160a0de Mon Sep 17 00:00:00 2001
From: Nick Cameron <ncameron@mozilla.com>
Date: Mon, 10 Oct 2016 18:14:45 +1300
Subject: [PATCH] Error monitor should emit error to stderr instead of stdout

---
 src/librustc_driver/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index 492165e2f2a8e..31e960ccda242 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -1110,7 +1110,7 @@ pub fn monitor<F: FnOnce() + Send + 'static>(f: F) {
                              errors::Level::Note);
             }
 
-            println!("{}", str::from_utf8(&data.lock().unwrap()).unwrap());
+            writeln!(io::stderr(), "{}", str::from_utf8(&data.lock().unwrap()).unwrap()).unwrap();
         }
 
         exit_on_err();