Bug #76252 [NEW]: Incrementing microseconds work funny

From: cz dot paranoiq at gmail dot com Operating system: PHP version: 7.2.4 Package: Date/time related Bug Type: Bug Bug description:Incrementing microseconds work funny Description: ------------ after adding 1 microsecond to datetime with 999999 microseconds, resulted datetime has the same seconds and 1000000 microseconds :] see the second dump https://3v4l.org/ZbGpl Test script: --------------- <?php $d = new \DateTimeImmutable('2000-01-01 23:59:59.999999'); $d2 = $d->modify('+1 microsecond'); var_dump($d); var_dump($d->format('s.u')); var_dump($d2); var_dump($d2->format('s.u')); -- Edit bug report at https://bugs.php.net/bug.php?id=76252&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76252&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76252&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76252&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76252&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76252&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76252&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76252&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76252&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76252&r=support Expected behavior: https://bugs.php.net/fix.php?id=76252&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76252&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76252&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76252&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76252&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76252&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76252&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76252&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76252&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76252&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76252&r=mysqlcfg