Bug #80998 [NEW]: Missing second with inverted interval

From: kylekatarnls at gmail dot com Operating system: Ubuntu PHP version: master-Git-2021-04-28 (Git) Package: Date/time related Bug Type: Bug Bug description:Missing second with inverted interval Description: ------------ When adding an inverted interval containing microseconds, 1 second miss in the final result (with PHP >= 8.1 but not < 8.1) See https://github.com/kylekatarnls/datetime-bug/runs/2456014545 Test script: --------------- $date = new DateTime('2021-04-05 14:00:00'); $interval = new DateInterval('P0DT10799S'); $interval->f = 0.999999; $interval->invert = 1; $date->add($interval); $string = $date->format('Y-m-d H:i:s.u'); echo $string; Expected result: ---------------- 2021-04-05 11:00:00.000001 Actual result: -------------- 2021-04-05 11:00:01.000001 -- Edit bug report at https://bugs.php.net/bug.php?id=80998&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80998&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80998&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80998&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80998&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80998&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80998&r=support Expected behavior: https://bugs.php.net/fix.php?id=80998&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80998&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80998&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80998&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80998&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80998&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80998&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80998&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80998&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80998&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80998&r=mysqlcfg