Merge branch '3.4' into 4.1

* 3.4:
  [Tests] Change to willThrowException
  [Console] fix PHPDoc in Command
  Fix wrong calls to clearstatcache
  Add Vietnamese translation for validators
  Allow running PHPUnit with "xdebug.scream" ON
  [Yaml] detect circular references

Author: fabpot

Tests/FinderTest.php

@@ -697,7 +697,7 @@ public function testAccessDeniedException()
 
         // restore original permissions
         chmod($testDir, 0777);
-        clearstatcache($testDir);
+        clearstatcache(true, $testDir);
 
         if ($couldRead) {
             $this->markTestSkipped('could read test files while test requires unreadable');
@@ -723,7 +723,7 @@ public function testIgnoredAccessDeniedException()
 
         // restore original permissions
         chmod($testDir, 0777);
-        clearstatcache($testDir);
+        clearstatcache(true, $testDir);
 
         if ($couldRead) {
             $this->markTestSkipped('could read test files while test requires unreadable');