From ec15cf2814116fa0dee1c0712fc754820e2bfb42 Mon Sep 17 00:00:00 2001
From: Mathieu Amiot <m.amiot@otak-arts.com>
Date: Tue, 10 Jul 2018 13:49:39 +0200
Subject: [PATCH] Fixed empty buffer being sent while there's still some inside

Could occur if bytes.len() was strictly double the size of buf.len()
---
 src/server/h2.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/server/h2.rs b/src/server/h2.rs
index d812f6f53..4c1c8a640 100644
--- a/src/server/h2.rs
+++ b/src/server/h2.rs
@@ -405,9 +405,8 @@ impl<T: Read> Read for IoWrapper<T> {
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
         if let Some(mut bytes) = self.unread.take() {
             let size = cmp::min(buf.len(), bytes.len());
-            buf[..size].copy_from_slice(&bytes[..size]);
-            if bytes.len() > size {
-                bytes.split_to(size);
+            buf[..size].copy_from_slice(&bytes.split_to(size));
+            if bytes.len() > 0 {
                 self.unread = Some(bytes);
             }
             Ok(size)