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Bug #46868 NaN == NaN on Windows
Submitted: 2008-12-15 13:47 UTC Modified: 2008-12-15 13:52 UTC
From: sv4php at fmethod dot com Assigned:
Status: Not a bug Package: Math related
PHP Version: 5.2.8 OS: Windows XP
Private report: No CVE-ID: None
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From: sv4php at fmethod dot com
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 [2008-12-15 13:47 UTC] sv4php at fmethod dot com 
Description:
------------
NaN should never match NaN by definition, but on the Windows builds of 5.2.5, 5.2.6, and 5.2.8 (5.2.7 not tested) it's true.

Strong emphasis on Windows, as it's a Windows-only issue.

Reproduce code:
---------------
$a = acos(8); // returns NaN

var_dump($a == $a); // false on Linux (proper), true on Windows (wrong)

Expected result:
----------------
bool(false)

Actual result:
--------------
bool(true)

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AllCommentsChangesGit/SVN commitsRelated reports
 [2008-12-15 13:52 UTC] pajoye@php.net 
Please do not submit the same bug more than once. An existing
bug report already describes this very problem. Even if you feel
that your issue is somewhat different, the resolution is likely
to be the same. 

Thank you for your interest in PHP.

duplicate of #42143
 
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