From 5fea00581b8bdc04256ede380cac0fd0da97489c Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Tue, 29 Nov 2011 19:21:41 +0100
Subject: [PATCH] sys: print stack trace if NODE_DEBUG=sys

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

diff --git a/lib/sys.js b/lib/sys.js
index c37e2a7d33a..d53a3dd95ea 100644
--- a/lib/sys.js
+++ b/lib/sys.js
@@ -25,7 +25,10 @@ var sysWarning;
 if (!sysWarning) {
   sysWarning = 'The "sys" module is now called "util". ' +
                'It should have a similar interface.';
-  util.error(sysWarning);
+  if (process.env.NODE_DEBUG && process.env.NODE_DEBUG.indexOf('sys') != -1)
+    console.trace(sysWarning);
+  else
+    console.error(sysWarning);
 }
 
 exports.print = util.print;