[travis-ci] Zend Garbage Collection only for PHP5.4

.travis.yml

@@ -9,5 +9,3 @@ before_script:
     - COMPOSER_ROOT_VERSION=dev-master composer --prefer-source --dev install
     - php src/Symfony/Component/Locale/Resources/data/build-data.php
     - export USE_INTL_ICU_DATA_VERSION=1
-
-script: phpunit -dzend.enable_gc=0

autoload.php.dist

@@ -1,5 +1,11 @@
 <?php
 
+if (version_compare(PHP_VERSION, '5.4', '>=') && gc_enabled()) {
+    // Disabling Zend Garbage Collection to prevent segfaults with PHP5.4+
+    // https://bugs.php.net/bug.php?id=53976
+    gc_disable();
+}
+
 $loader = require_once __DIR__.'/vendor/autoload.php';
 
 use Doctrine\Common\Annotations\AnnotationRegistry;

phpunit.xml.dist

@@ -14,6 +14,7 @@
     <php>
         <ini name="intl.default_locale" value="en"/>
         <ini name="intl.error_level" value="0"/>
+        <ini name="memory_limit" value="-1"/>
     </php>
 
     <testsuites>