Bug #76876 [NEW]: Bug

From: pls-kick-me at yandex dot ru Operating system: Windows/Ubuntu PHP version: 7.2.9 Package: *General Issues Bug Type: Bug Bug description:Bug Description: ------------ Just calculations. At the end of them unexpected result Test script: --------------- $total_vote = 2.9; $points_teaches = [-0.1, -0.1, -0.1, -0.1, -0.1, -0.1, -0.1, -0.1, -0.1, -0.1]; foreach($points_teaches as $point) { $total_vote += $point; } $total_vote += -0.3; $total_vote += -0.3; $total_vote += -0.3; $total_vote += -0.5; $points_p = [-0.05, -0.05, -0.05, -0.05, -0.05 -0.05, -0.05, -0.05, -0.05, -0.05]; $p = 0.0; foreach ($points_p as $points) { $p += $points; } $total_vote += $p; die($total_vote); Expected result: ---------------- $total_vote == 0 Actual result: -------------- $total_vote == -1.1102230246252E-15 -- Edit bug report at https://bugs.php.net/bug.php?id=76876&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76876&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76876&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76876&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76876&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76876&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76876&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76876&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76876&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76876&r=support Expected behavior: https://bugs.php.net/fix.php?id=76876&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76876&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76876&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76876&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76876&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76876&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76876&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76876&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76876&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76876&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76876&r=mysqlcfg