update v1.0.7.9 R.C.

This is a Release Candidate. We are still testing.

vendor/symfony/yaml/Inline.php

@@ -214,6 +214,28 @@ class Inline
         }
     }
 
+    /**
+     * Check if given array is hash or just normal indexed array.
+     *
+     * @internal
+     *
+     * @param array $value The PHP array to check
+     *
+     * @return bool true if value is hash array, false otherwise
+     */
+    public static function isHash(array $value)
+    {
+        $expectedKey = 0;
+
+        foreach ($value as $key => $val) {
+            if ($key !== $expectedKey++) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Dumps a PHP array to a YAML string.
      *
@@ -225,11 +247,7 @@ class Inline
     private static function dumpArray($value, $flags)
     {
         // array
-        $keys = array_keys($value);
-        $keysCount = count($keys);
-        if ((1 === $keysCount && '0' == $keys[0])
-            || ($keysCount > 1 && array_reduce($keys, function ($v, $w) { return (int) $v + $w; }, 0) === $keysCount * ($keysCount - 1) / 2)
-        ) {
+        if ($value && !self::isHash($value)) {
             $output = array();
             foreach ($value as $val) {
                 $output[] = self::dump($val, $flags);
@@ -238,7 +256,7 @@ class Inline
             return sprintf('[%s]', implode(', ', $output));
         }
 
-        // mapping
+        // hash
         $output = array();
         foreach ($value as $key => $val) {
             $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));