Merge branch 'PHP-7.0'

* PHP-7.0:
  Fix DatePeriod::getEndDate() segfault

ext/date/php_date.c

@@ -4447,6 +4447,10 @@ PHP_METHOD(DatePeriod, getEndDate)
 
         dpobj = Z_PHPPERIOD_P(getThis());
 
+        if (!dpobj->end) {
+                return;
+        }
+
         php_date_instantiate(dpobj->start_ce, return_value);
         dateobj = Z_PHPDATE_P(return_value);
         dateobj->time = timelib_time_ctor();

ext/date/tests/bug71635.phpt

@@ -0,0 +1,11 @@
+--TEST--
+Bug #71635 (segfault in DatePeriod::getEndDate() when no end date has been set)
+--FILE--
+<?php
+date_default_timezone_set('UTC');
+$period = new DatePeriod(new DateTimeImmutable("now"), new DateInterval("P2Y4DT6H8M"), 2);
+
+var_dump($period->getEndDate());
+?>
+--EXPECT--
+NULL