Backported the fix for bug #53437

Author: weltling

NEWS

@@ -8,6 +8,10 @@ PHP                                                                        NEWS
   . Fixed bug #64960 (Segfault in gc_zval_possible_root). (Laruence)
   . Fixed bug #64934 (Apache2 TS crash with get_browser()). (Anatol)
 
+- DateTime:
+  . Fixed bug #53437 (Crash when using unserialized DatePeriod instance).
+    (Gustavo, Derick, Anatol)
+
 - FPM:
   . Fixed Bug #64915 (error_log ignored when daemonize=0). (Remi)