From a6b8f63660c3f5ee50b2625f7a86f03fbe45ec12 Mon Sep 17 00:00:00 2001
From: Bert Belder <bertbelder@gmail.com>
Date: Sat, 5 Jan 2013 22:14:50 +0100
Subject: [PATCH] buffer: zero-length buffers shouldn't be slab-backed

---
 lib/buffer.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/buffer.js b/lib/buffer.js
index 91a6326b9ab..ca53ab95182 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -199,8 +199,9 @@ function coerce(length) {
 }
 
 
-// Buffer
+var zeroBuffer = new SlowBuffer(0);
 
+// Buffer
 function Buffer(subject, encoding, offset) {
   if (!(this instanceof Buffer)) {
     return new Buffer(subject, encoding, offset);
@@ -242,13 +243,18 @@ function Buffer(subject, encoding, offset) {
       this.parent = new SlowBuffer(this.length);
       this.offset = 0;
 
-    } else {
+    } else if (this.length > 0) {
       // Small buffer.
       if (!pool || pool.length - pool.used < this.length) allocPool();
       this.parent = pool;
       this.offset = pool.used;
       pool.used += this.length;
       if (pool.used & 7) pool.used = (pool.used + 8) & ~7;
+
+    } else {
+      // Zero-length buffer
+      this.parent = zeroBuffer;
+      this.offset = 0;
     }
 
     // Treat array-ish objects as a byte array.