Fix segfault in period caster

Author: maidmaid

src/Symfony/Component/VarDumper/Caster/DateCaster.php

@@ -85,7 +85,7 @@ public static function castTimeZone(\DateTimeZone $timeZone, array $a, Stub $stu
 
     public static function castPeriod(\DatePeriod $p, array $a, Stub $stub, $isNested, $filter)
     {
-        if (defined('HHVM_VERSION_ID') || \PHP_VERSION_ID < 50605) {
+        if (defined('HHVM_VERSION_ID') || \PHP_VERSION_ID < 50620 || (\PHP_VERSION_ID >= 70000 && \PHP_VERSION_ID < 70005)) { // see https://bugs.php.net/bug.php?id=71635
             return $a;
         }
 

src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php

@@ -334,7 +334,7 @@ public function testDumpPeriod($start, $interval, $end, $options, $expected)
      */
     public function testCastPeriod($start, $interval, $end, $options, $xPeriod, $xDates)
     {
-        if (defined('HHVM_VERSION_ID') || \PHP_VERSION_ID < 50605) {
+        if (defined('HHVM_VERSION_ID') || \PHP_VERSION_ID < 50620 || (\PHP_VERSION_ID >= 70000 && \PHP_VERSION_ID < 70005)) {
             $this->markTestSkipped();
         }