symfony
diff --git a/‎src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
Lines changed: 13 additions & 3 deletions b/‎src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
Lines changed: 13 additions & 3 deletions
diff --git a/‎src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
Lines changed: 15 additions & 0 deletions b/‎src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
Lines changed: 15 additions & 0 deletions
@@ -103,8 +103,9 @@ class NativeSessionStorage implements SessionStorageInterface
     public function __construct(array $options = array(), $handler = null, MetadataBag $metaBag = null)
     {
         $this->setMetadataBag($metaBag);
+        $this->setSaveHandler($handler);
 
-        if (\PHP_VERSION_ID >= 50400 && \PHP_SESSION_ACTIVE === session_status()) {
+        if (!$this->canUpdatePhpSession()) {
             return;
         }
 
@@ -121,7 +122,6 @@ public function __construct(array $options = array(), $handler = null, MetadataB
         }
 
         $this->setOptions($options);
-        $this->setSaveHandler($handler);
     }
 
     /**
@@ -408,7 +408,7 @@ public function setSaveHandler($saveHandler = null)
         }
         $this->saveHandler = $saveHandler;
 
-        if ($this->saveHandler instanceof \SessionHandlerInterface) {
+        if ($this->saveHandler instanceof \SessionHandlerInterface && $this->canUpdatePhpSession()) {
             if (\PHP_VERSION_ID >= 50400) {
                 session_set_save_handler($this->saveHandler, false);
             } else {
@@ -449,4 +449,14 @@ protected function loadSession(array &$session = null)
         $this->started = true;
         $this->closed = false;
     }
+
+    /**
+     * Return true if we can update PHP's session.
+     *
+     * @return bool
+     */
+    private function canUpdatePhpSession()
+    {
+        return \PHP_VERSION_ID <= 50400 || \PHP_SESSION_ACTIVE !== session_status();
+    }
 }
@@ -296,4 +296,19 @@ public function testSetSessionOptionsOnceSessionStartedIsIgnored()
         // Assert no exception has been thrown by `getStorage()`
         $this->addToAssertionCount(1);
     }
+
+    /**
+     * @requires PHP 5.4
+     */
+    public function testGetBagsOnceSessionStartedIsIgnored()
+    {
+        session_start();
+        $bag = new AttributeBag();
+        $bag->setName('flashes');
+
+        $storage = $this->getStorage();
+        $storage->registerBag($bag);
+
+        $this->assertEquals($storage->getBag('flashes'), $bag);
+    }
 }
Original file line number	Diff line number	Diff line change
`@@ -103,8 +103,9 @@ class NativeSessionStorage implements SessionStorageInterface`
`103`	`103`	`public function __construct(array $options = array(), $handler = null, MetadataBag $metaBag = null)`
`104`	`104`	`{`
`105`	`105`	`$this->setMetadataBag($metaBag);`
	`106`	`+ $this->setSaveHandler($handler);`
`106`	`107`
`107`		`- if (\PHP_VERSION_ID >= 50400 && \PHP_SESSION_ACTIVE === session_status()) {`
	`108`	`+ if (!$this->canUpdatePhpSession()) {`
`108`	`109`	`return;`
`109`	`110`	`}`
`110`	`111`
`@@ -121,7 +122,6 @@ public function __construct(array $options = array(), $handler = null, MetadataB`
`121`	`122`	`}`
`122`	`123`
`123`	`124`	`$this->setOptions($options);`
`124`		`- $this->setSaveHandler($handler);`
`125`	`125`	`}`
`126`	`126`
`127`	`127`	`/**`
`@@ -408,7 +408,7 @@ public function setSaveHandler($saveHandler = null)`
`408`	`408`	`}`
`409`	`409`	`$this->saveHandler = $saveHandler;`
`410`	`410`
`411`		`- if ($this->saveHandler instanceof \SessionHandlerInterface) {`
	`411`	`+ if ($this->saveHandler instanceof \SessionHandlerInterface && $this->canUpdatePhpSession()) {`
`412`	`412`	`if (\PHP_VERSION_ID >= 50400) {`
`413`	`413`	`session_set_save_handler($this->saveHandler, false);`
`414`	`414`	`} else {`
`@@ -449,4 +449,14 @@ protected function loadSession(array &$session = null)`
`449`	`449`	`$this->started = true;`
`450`	`450`	`$this->closed = false;`
`451`	`451`	`}`
	`452`	`+`
	`453`	`+ /**`
	`454`	`+ * Return true if we can update PHP's session.`
	`455`	`+ *`
	`456`	`+ * @return bool`
	`457`	`+ */`
	`458`	`+ private function canUpdatePhpSession()`
	`459`	`+ {`
	`460`	`+ return \PHP_VERSION_ID <= 50400 \|\| \PHP_SESSION_ACTIVE !== session_status();`
	`461`	`+ }`
`452`	`462`	`}`