Bug #53632 [Com]: PHP hangs on numeric value 2.2250738585072011e-308

Edit report at http://bugs.php.net/bug.php?id=53632&edit=1 ID: 53632 Comment by: cswarth at gmail dot com Reported by: exploringbinary at gmail dot com Summary: PHP hangs on numeric value 2.2250738585072011e-308 Status: Assigned Type: Bug Package: Math related PHP Version: 5.3.4 Assigned To: dmitry Block user comment: N Private report: N New Comment: Doesn't happen on a mac. $ php -v PHP 5.3.1 (cli) (built: Feb 11 2010 02:32:22) Copyright (c) 1997-2009 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2009 Zend Technologies $ php -r "print 2.2250738585072011e-308;" 2.2250738585072E-308 Previous Comments: ------------------------------------------------------------------------ [2011-01-02 16:52:43] exploringbinary at gmail dot com I also get the same problem on Linux (PHP Version 5.3.2-1ubuntu4.5). ------------------------------------------------------------------------ [2011-01-02 16:49:48] pajoye@php.net Dmitry, can you take a look at it please? ------------------------------------------------------------------------ [2011-01-02 16:44:38] exploringbinary at gmail dot com (Remove 2.2250738585072012e-308 from my list of examples; it does NOT map to the same floating-point number as 2.2250738585072011e-308 -- when converted correctly!) ------------------------------------------------------------------------ [2010-12-30 06:58:41] exploringbinary at gmail dot com Description: ------------ If I assign the value 2.2250738585072011e-308 to a variable, e.g. $d = 2.2250738585072011e-308, PHP hangs (loops). I am using PHP 5.3.1 XAMPP 1.7.3 on Windows. 2.2250738585072011e-308 represents the largest subnormal double-precision floating-point number, 0.1111111111111111111111111111111111111111111111111111 x 2^-1022. Interestingly, nearby decimal literals 2.2250738585072008e-308, 2.2250738585072009e-308, 2.2250738585072010e-308 and 2.2250738585072012e-308 -- which all convert to the same floating-point value -- do not cause this problem. Test script: --------------- <?php $d = 2.2250738585072011e-308; ?> Expected result: ---------------- No Hang. Actual result: -------------- Hang. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=53632&edit=1