Merge branch '3.3' into 3.4

* 3.3:
  [Profiler] Fix data collector getCasters() call
  remove symfony/process suggestion
  [DI] Remove unused dynamic property
  [Process] Fixed issue between process builder and exec
  non-conflicting anonymous service ids across files

ProcessBuilder.php

@@ -268,6 +268,9 @@ public function getProcess()
 
         $arguments = array_merge($this->prefix, $this->arguments);
         $process = new Process($arguments, $this->cwd, $this->env, $this->input, $this->timeout, $this->options);
+        // to preserve the BC with symfony <3.3, we convert the array structure
+        // to a string structure to avoid the prefixing with the exec command
+        $process->setCommandLine($process->getCommandLine());
 
         if ($this->inheritEnv) {
             $process->inheritEnvironmentVariables();

Tests/ProcessBuilderTest.php

@@ -210,4 +210,17 @@ public function testInvalidInput()
         $builder = ProcessBuilder::create();
         $builder->setInput(array());
     }
+
+    public function testDoesNotPrefixExec()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('This test cannot run on Windows.');
+        }
+
+        $builder = ProcessBuilder::create(array('command', '-v', 'ls'));
+        $process = $builder->getProcess();
+        $process->run();
+
+        $this->assertTrue($process->isSuccessful());
+    }
 }