Bug #75642 [NEW]: Wrap around behaviour for microseconds is not working

From: marcospassos dot com at gmail dot com Operating system: OSX PHP version: 7.2.0 Package: Date/time related Bug Type: Bug Bug description:Wrap around behaviour for microseconds is not working Description: ------------ When adding 1 microsecond to 999999 does not increment the seconds part. Test script: --------------- // https://3v4l.org/Wl6if $date = new \DateTime('2017-12-31 23:59:59.999999'); echo $date->format('Y-m-d H:i:s.u'); echo "\n"; echo $date->modify('+1 microsecond')->format('Y-m-d H:i:s.u'); Expected result: ---------------- 2017-12-31 23:59:59.999999 2016-01-01 00:00:00.000000 Actual result: -------------- 2017-12-31 23:59:59.999999 2017-12-31 23:59:59.1000000 -- Edit bug report at https://bugs.php.net/bug.php?id=75642&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75642&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75642&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75642&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75642&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75642&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75642&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75642&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75642&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75642&r=support Expected behavior: https://bugs.php.net/fix.php?id=75642&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75642&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75642&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75642&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75642&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75642&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75642&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75642&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75642&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75642&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75642&r=mysqlcfg