From aac0f80aad7fee242df1109f13e261e0b4c5d9e8 Mon Sep 17 00:00:00 2001
From: Yury Delendik <ydelendik@mozilla.com>
Date: Sat, 22 Jun 2013 14:07:04 -0500
Subject: [PATCH] #1277: ignoring error for bad "empty" block

---
 src/stream.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/stream.js b/src/stream.js
index b01075840..985514f80 100644
--- a/src/stream.js
+++ b/src/stream.js
@@ -504,8 +504,11 @@ var FlateStream = (function FlateStreamClosure() {
       if (typeof (b = bytes[bytesPos++]) == 'undefined')
         error('Bad block header in flate stream');
       check |= (b << 8);
-      if (check != (~blockLen & 0xffff))
+      if (check != (~blockLen & 0xffff) &&
+          (blockLen !== 0 || check !== 0)) {
+        // Ignoring error for bad "empty" block (see issue 1277)
         error('Bad uncompressed block length in flate stream');
+      }
 
       this.codeBuf = 0;
       this.codeSize = 0;