Bug #79185 [NEW]: sum numbers expecting to return 0

From: marius dot veleanu at gmail dot com Operating system: macOS Catalina 10.15.2 PHP version: 7.3.14 Package: *General Issues Bug Type: Bug Bug description:sum numbers expecting to return 0 Description: ------------ the sum of the numbers (positive and negative) in a loop, is expected to be 0 tested with: PHP 7.3.12-1 PHP 7.0.33-0 (cli) PHP 7.3.9 (cli) Test script: --------------- $arr = [1.9, 1.9, 1.9, -5.7]; or $arr = [1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, -15.2]; or $arr = [1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, -22.8]; echo array_sum($arr); //-8.8817841970013E-16 //1.7763568394003E-15 //-3.5527136788005E-15 AND same result with $total = 0; foreach( $arr as $a ){ $total += $a; } echo $total; // -8.8817841970013E-16 //1.7763568394003E-15 //-3.5527136788005E-15 BUT this works $arr = [1.9, 1.9, -3.8]; //0 $arr = [1.9, 1.9, 1.9, 1.9, -7.6]; //0 $arr = [1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, 1.9, -17.1]; //0 -- Edit bug report at https://bugs.php.net/bug.php?id=79185&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79185&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79185&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79185&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79185&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79185&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79185&r=support Expected behavior: https://bugs.php.net/fix.php?id=79185&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79185&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79185&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79185&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79185&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79185&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79185&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79185&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79185&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79185&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79185&r=mysqlcfg