From f3496d3ed254d6d40341856397536e2106f20631 Mon Sep 17 00:00:00 2001
From: Rumkin <dev@rumk.in>
Date: Sun, 1 May 2016 15:44:46 +0000
Subject: [PATCH] util: fix invalid date output with util.inspect

Prevent util.inspect of throwing on date object with invalid date value.
It changed to output result of toString method call.
---
 lib/util.js                        | 6 +++++-
 test/parallel/test-util-inspect.js | 3 ++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index 63d6d0f3c865af..d64eb5f2ab1ef4 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -304,7 +304,11 @@ function formatValue(ctx, value, recurseTimes) {
       return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
     }
     if (isDate(value)) {
-      return ctx.stylize(Date.prototype.toISOString.call(value), 'date');
+      if (Number.isNaN(value.getTime())) {
+        return ctx.stylize(value.toString(), 'date');
+      } else {
+        return ctx.stylize(Date.prototype.toISOString.call(value), 'date');
+      }
     }
     if (isError(value)) {
       return formatError(value);
diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
index 9e713cf16c542b..77bf913faf6533 100644
--- a/test/parallel/test-util-inspect.js
+++ b/test/parallel/test-util-inspect.js
@@ -12,8 +12,9 @@ assert.equal(util.inspect(function() {}), '[Function]');
 assert.equal(util.inspect(undefined), 'undefined');
 assert.equal(util.inspect(null), 'null');
 assert.equal(util.inspect(/foo(bar\n)?/gi), '/foo(bar\\n)?/gi');
-assert.equal(util.inspect(new Date('Sun, 14 Feb 2010 11:48:40 GMT')),
+assert.strictEqual(util.inspect(new Date('Sun, 14 Feb 2010 11:48:40 GMT')),
   new Date('2010-02-14T12:48:40+01:00').toISOString());
+assert.strictEqual(util.inspect(new Date('')), (new Date('')).toString());
 
 assert.equal(util.inspect('\n\u0001'), "'\\n\\u0001'");