From 8fee3f6f6e7155bb5316b2a6145ff3ef44c0824d Mon Sep 17 00:00:00 2001
From: Corey Richardson <corey@octayn.net>
Date: Wed, 19 Mar 2014 23:20:39 -0400
Subject: [PATCH] std: io: flush stdout on stdin read from tty

---
 src/libstd/io/stdio.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/libstd/io/stdio.rs b/src/libstd/io/stdio.rs
index 7c65e76ab4731..7b3667a968a8e 100644
--- a/src/libstd/io/stdio.rs
+++ b/src/libstd/io/stdio.rs
@@ -296,7 +296,13 @@ pub struct StdReader {
 impl Reader for StdReader {
     fn read(&mut self, buf: &mut [u8]) -> IoResult<uint> {
         let ret = match self.inner {
-            TTY(ref mut tty) => tty.read(buf),
+            TTY(ref mut tty) => {
+                // Flush the task-local stdout so that weird issues like a
+                // print!'d prompt not being shown until after the user hits
+                // enter.
+                flush();
+                tty.read(buf)
+            },
             File(ref mut file) => file.read(buf).map(|i| i as uint),
         };
         match ret {