use the parseFile() method of the YAML parser

Author: xabbuh

Loader/YamlFileLoader.php

@@ -58,7 +58,7 @@ public function load($file, $type = null)
         }
 
         try {
-            $parsedConfig = $this->yamlParser->parse(file_get_contents($path));
+            $parsedConfig = $this->yamlParser->parseFile($path);
         } catch (ParseException $e) {
             throw new \InvalidArgumentException(sprintf('The file "%s" does not contain valid YAML.', $path), 0, $e);
         }

composer.json

@@ -21,7 +21,7 @@
     "require-dev": {
         "symfony/config": "~2.8|~3.0|~4.0",
         "symfony/http-foundation": "~2.8|~3.0|~4.0",
-        "symfony/yaml": "~3.3|~4.0",
+        "symfony/yaml": "~3.4|~4.0",
         "symfony/expression-language": "~2.8|~3.0|~4.0",
         "symfony/dependency-injection": "~3.3|~4.0",
         "doctrine/annotations": "~1.0",
@@ -31,7 +31,7 @@
     "conflict": {
         "symfony/config": "<2.8",
         "symfony/dependency-injection": "<3.3",
-        "symfony/yaml": "<3.3"
+        "symfony/yaml": "<3.4"
     },
     "suggest": {
         "symfony/http-foundation": "For using a Symfony Request object",