From: Feross Aboukhadijeh <feross@feross.org>
Date: Fri, 16 Feb 2018 05:56:28 +0000 (-0800)
Subject: more robust check for invalid arguments to copy()
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=f89256deea4ca98945ecfdd67b79ccb463ba4fcd;p=buffer.git

more robust check for invalid arguments to copy()
---

diff --git a/index.js b/index.js
index b2ace85..0e45b2a 100644
--- a/index.js
+++ b/index.js
@@ -1465,9 +1465,7 @@ Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert
 
 // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
 Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (target === undefined) {
-    throw new TypeError('argument should be a Buffer')
-  }
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
   if (!start) start = 0
   if (!end && end !== 0) end = this.length
   if (targetStart >= target.length) targetStart = target.length