From b718e458069a130bea0cd3a7109811d0d073e8ff Mon Sep 17 00:00:00 2001
From: Gus Caplan <me@gus.host>
Date: Wed, 6 Dec 2017 15:09:07 -0600
Subject: [PATCH] util: fix negative 0 check in inspect

PR-URL: https://github.com/nodejs/node/pull/17507
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Khaidi Chu <i@2333.moe>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
---
 lib/util.js                        | 6 ++----
 test/parallel/test-util-inspect.js | 2 ++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index 7809cfb7d4109c..9cd5e11719255d 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -617,10 +617,8 @@ function formatValue(ctx, value, recurseTimes, ln) {
 }
 
 function formatNumber(fn, value) {
-  // Format -0 as '-0'. A `value === -0` check won't distinguish 0 from -0.
-  // Using a division check is currently faster than `Object.is(value, -0)`
-  // as of V8 6.1.
-  if (1 / value === -Infinity)
+  // Format -0 as '-0'. Checking `value === -0` won't distinguish 0 from -0.
+  if (Object.is(value, -0))
     return fn('-0', 'number');
   return fn(`${value}`, 'number');
 }
diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js
index 722ae7d4bd9723..ef4de121bb35f7 100644
--- a/test/parallel/test-util-inspect.js
+++ b/test/parallel/test-util-inspect.js
@@ -405,6 +405,8 @@ assert.strictEqual(
 // test positive/negative zero
 assert.strictEqual(util.inspect(0), '0');
 assert.strictEqual(util.inspect(-0), '-0');
+// edge case from check
+assert.strictEqual(util.inspect(-5e-324), '-5e-324');
 
 // test for sparse array
 {