Bug #80376 [Opn]: last day of the month causes runway cpu usage

Edit report at https://bugs.php.net/bug.php?id=80376&edit=1 ID: 80376 User updated by: mav2287 at aol dot com Reported by: mav2287 at aol dot com Summary: last day of the month causes runway cpu usage Status: Open Type: Bug Package: Date/time related Operating System: OS X 10.11.6 El Capitan PHP Version: 7.4.12 Block user comment: N Private report: N New Comment: In case it isn't clear when using the sample script once you execute "$newDate = $date->modify('last day of this month');" PHP will hang. You will never get the chance to go to the next step of the script and do "php > var_dump($newDate);" as the object is never created, Previous Comments: ------------------------------------------------------------------------ [2020-11-17 19:38:15] mav2287 at aol dot com Description: ------------ As discovered and documented via the Mac Ports project ( see ticket url below ) php versions 7.3.23 & 7.4.11 and newer seem to create a process with runaway CPU usage when attempting to get the last day of the month. This runaway process seems to continue indefinitely and consumes 100% cpu. Orignal Mac Ports Ticket: https://trac.macports.org/ticket/61351 Test script: --------------- # php -a Interactive shell php > $date = new \DateTime(); php > $newDate = $date->modify('last day of this month'); php > var_dump($newDate); Expected result: ---------------- creation of a DateTime object and a blinking cursor awaiting new command Actual result: -------------- PHP will hang indefinitely and the php process will consume 100% cpu until manually killed ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80376&edit=1