From 77c18d1e1b470d99af317a2b1ed4b7e9bb81d5b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maciej=20Ma=C5=82ecki?= <maciej.malecki@notimplemented.org>
Date: Sun, 29 Apr 2012 15:17:16 +0200
Subject: [PATCH] console: throw when no such label exists in `console.timeEnd`

Test included.
---
 lib/console.js              | 6 +++++-
 test/simple/test-console.js | 9 +++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/console.js b/lib/console.js
index ac8912f828e..64d21a4266c 100644
--- a/lib/console.js
+++ b/lib/console.js
@@ -49,7 +49,11 @@ exports.time = function(label) {
 
 
 exports.timeEnd = function(label) {
-  var duration = Date.now() - times[label];
+  var time = times[label];
+  if (!time) {
+    throw new Error('No such label: ' + label);
+  }
+  var duration = Date.now() - time;
   exports.log('%s: %dms', label, duration);
 };
 
diff --git a/test/simple/test-console.js b/test/simple/test-console.js
index 3a73286def8..d07ca50ae4a 100644
--- a/test/simple/test-console.js
+++ b/test/simple/test-console.js
@@ -50,3 +50,12 @@ assert.equal('foo bar hop\n', strings.shift());
 assert.equal("{ slashes: '\\\\\\\\' }\n", strings.shift());
 
 process.stderr.write('hello world');
+
+assert.throws(function () {
+  console.timeEnd('no such label');
+});
+
+assert.doesNotThrow(function () {
+  console.time('label');
+  console.timeEnd('label');
+});