Bug #73837 [NEW]: "new DateTime()" sometimes returns 1 second ago value on PHP 7.1.0

From: for-bugs at hnw dot jp Operating system: macOS PHP version: 7.1.0 Package: Date/time related Bug Type: Bug Bug description:"new DateTime()" sometimes returns 1 second ago value on PHP 7.1.0 Description: ------------ From PHP 7.1, DateTime constructor fills microseconds. However, setting seconds and setting microseconds are in different function, so sometimes DateTime instance has 1 second ago value from actual time. Test script: --------------- <?php $prev_dt = new DateTime(); while (true) { $dt = new DateTime(); if ($prev_dt > $dt) { var_dump($prev_dt->format("Y-m-d H:i:s.u")); var_dump($dt->format("Y-m-d H:i:s.u")); break; } $prev_dt = $dt; } Expected result: ---------------- infinite loop Actual result: -------------- soon ends and outputs like this: string(26) "2016-12-29 18:35:54.999998" string(26) "2016-12-29 18:35:54.000000" -- Edit bug report at https://bugs.php.net/bug.php?id=73837&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73837&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73837&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73837&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73837&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73837&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73837&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73837&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73837&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73837&r=support Expected behavior: https://bugs.php.net/fix.php?id=73837&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73837&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73837&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73837&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73837&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73837&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73837&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73837&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73837&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73837&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73837&r=mysqlcfg