From 52a18ea163f30f6b2468bf254ec27e1e6e013e03 Mon Sep 17 00:00:00 2001
From: Jonathan Poston <jfposton@gmail.com>
Date: Wed, 23 Oct 2013 22:56:37 -0400
Subject: [PATCH] Check if the pipe array is empty before calling
 stream_select()

---
 src/Symfony/Component/Process/ProcessPipes.php         |  4 ++++
 .../Component/Process/Tests/AbstractProcessTest.php    | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/Symfony/Component/Process/ProcessPipes.php b/src/Symfony/Component/Process/ProcessPipes.php
index 43e1501029b0..6f0bd7dbb67d 100644
--- a/src/Symfony/Component/Process/ProcessPipes.php
+++ b/src/Symfony/Component/Process/ProcessPipes.php
@@ -247,6 +247,10 @@ private function readFileHandles($close = false)
      */
     private function readStreams($blocking, $close = false)
     {
+        if (empty($this->pipes)) {
+            return array();
+        }
+
         $read = array();
 
         $r = $this->pipes;
diff --git a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
index 0fe78b28e56d..0558d074dd35 100644
--- a/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php
@@ -19,6 +19,16 @@
  */
 abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
 {
+    public function testThatProcessDoesNotThrowWarningDuringRun()
+    {
+        @trigger_error('Test Error', E_USER_NOTICE);
+        $process = $this->getProcess("php -r 'sleep(3)'");
+        $process->run();
+        $actualError = error_get_last();
+        $this->assertEquals('Test Error', $actualError['message']);
+        $this->assertEquals(E_USER_NOTICE, $actualError['type']);
+    }
+
     /**
      * @expectedException \Symfony\Component\Process\Exception\InvalidArgumentException
      */