diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index 316d0083c6..e404964fc6 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -940,29 +940,54 @@ class Crawler implements \Countable, \IteratorAggregate
     {
         $expressions = array();
 
-        $unionPattern = '/\|(?![^\[]*\])/';
         // An expression which will never match to replace expressions which cannot match in the crawler
         // We cannot simply drop
         $nonMatchingExpression = 'a[name() = "b"]';
 
-        // Split any unions into individual expressions.
-        foreach (preg_split($unionPattern, $xpath) as $expression) {
-            $expression = trim($expression);
-            $parenthesis = '';
+        $xpathLen = strlen($xpath);
+        $openedBrackets = 0;
+        $startPosition = strspn($xpath, " \t\n\r\0\x0B");
 
-            // If the union is inside some braces, we need to preserve the opening braces and apply
-            // the change only inside it.
-            if (preg_match('/^[\(\s*]+/', $expression, $matches)) {
-                $parenthesis = $matches[0];
-                $expression = substr($expression, strlen($parenthesis));
+        for ($i = $startPosition; $i <= $xpathLen; ++$i) {
+            $i += strcspn($xpath, '"\'[]|', $i);
+
+            if ($i < $xpathLen) {
+                switch ($xpath[$i]) {
+                    case '"':
+                    case "'":
+                        if (false === $i = strpos($xpath, $xpath[$i], $i + 1)) {
+                            return $xpath; // The XPath expression is invalid
+                        }
+                        continue 2;
+                    case '[':
+                        ++$openedBrackets;
+                        continue 2;
+                    case ']':
+                        --$openedBrackets;
+                        continue 2;
+                }
             }
+            if ($openedBrackets) {
+                continue;
+            }
+
+            if ($startPosition < $xpathLen && '(' === $xpath[$startPosition]) {
+                // If the union is inside some braces, we need to preserve the opening braces and apply
+                // the change only inside it.
+                $j = 1 + strspn($xpath, "( \t\n\r\0\x0B", $startPosition + 1);
+                $parenthesis = substr($xpath, $startPosition, $j);
+                $startPosition += $j;
+            } else {
+                $parenthesis = '';
+            }
+            $expression = rtrim(substr($xpath, $startPosition, $i - $startPosition));
 
             if (0 === strpos($expression, 'self::*/')) {
                 $expression = './'.substr($expression, 8);
             }
 
             // add prefix before absolute element selector
-            if (empty($expression)) {
+            if ('' === $expression) {
                 $expression = $nonMatchingExpression;
             } elseif (0 === strpos($expression, '//')) {
                 $expression = 'descendant-or-self::'.substr($expression, 2);
@@ -975,7 +1000,7 @@ class Crawler implements \Countable, \IteratorAggregate
             } elseif ('/' === $expression[0] || '.' === $expression[0] || 0 === strpos($expression, 'self::')) {
                 $expression = $nonMatchingExpression;
             } elseif (0 === strpos($expression, 'descendant::')) {
-                $expression = 'descendant-or-self::'.substr($expression, strlen('descendant::'));
+                $expression = 'descendant-or-self::'.substr($expression, 12);
             } elseif (preg_match('/^(ancestor|ancestor-or-self|attribute|following|following-sibling|namespace|parent|preceding|preceding-sibling)::/', $expression)) {
                 // the fake root has no parent, preceding or following nodes and also no attributes (even no namespace attributes)
                 $expression = $nonMatchingExpression;
@@ -983,9 +1008,16 @@ class Crawler implements \Countable, \IteratorAggregate
                 $expression = 'self::'.$expression;
             }
             $expressions[] = $parenthesis.$expression;
+
+            if ($i === $xpathLen) {
+                return implode(' | ', $expressions);
+            }
+
+            $i += strspn($xpath, " \t\n\r\0\x0B", $i + 1);
+            $startPosition = $i + 1;
         }
 
-        return implode(' | ', $expressions);
+        return $xpath; // The XPath expression is invalid
     }
 
     /**
diff --git a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
index b54563b7c6..d4bb0f6686 100755
--- a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
@@ -430,6 +430,7 @@ EOF
         $this->assertCount(5, $crawler->filterXPath('(//a | //div)//img'));
         $this->assertCount(7, $crawler->filterXPath('((//a | //div)//img | //ul)'));
         $this->assertCount(7, $crawler->filterXPath('( ( //a | //div )//img | //ul )'));
+        $this->assertCount(1, $crawler->filterXPath("//a[./@href][((./@id = 'Klausi|Claudiu' or normalize-space(string(.)) = 'Klausi|Claudiu' or ./@title = 'Klausi|Claudiu' or ./@rel = 'Klausi|Claudiu') or .//img[./@alt = 'Klausi|Claudiu'])]"));
     }
 
     public function testFilterXPath()
@@ -596,7 +597,7 @@ EOF
 
         $this->assertCount(0, $crawler->filterXPath('self::a'), 'The fake root node has no "real" element name');
         $this->assertCount(0, $crawler->filterXPath('self::a/img'), 'The fake root node has no "real" element name');
-        $this->assertCount(9, $crawler->filterXPath('self::*/a'));
+        $this->assertCount(10, $crawler->filterXPath('self::*/a'));
     }
 
     public function testFilter()
@@ -1079,6 +1080,8 @@ HTML;
 
                     <a href="?get=param">GetLink</a>
 
+                    <a href="/example">Klausi|Claudiu</a>
+
                     <form action="foo" id="FooFormId">
                         <input type="text" value="TextValue" name="TextName" />
                         <input type="submit" value="FooValue" name="FooName" id="FooId" />
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index 2d23c7f993..792d8bdbe7 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -94,11 +94,11 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
                     } elseif (isset($trace[$i]['object']) && $trace[$i]['object'] instanceof \Twig_Template) {
                         $template = $trace[$i]['object'];
                         $name = $template->getTemplateName();
-                        $file = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getPath() : false;
                         $src = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getCode() : (method_exists($template, 'getSource') ? $template->getSource() : false);
                         $info = $template->getDebugInfo();
-                        if (null !== $src && isset($info[$trace[$i - 1]['line']])) {
+                        if (isset($info[$trace[$i - 1]['line']])) {
                             $line = $info[$trace[$i - 1]['line']];
+                            $file = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getPath() : false;
 
                             if ($src) {
                                 $src = explode("\n", $src);
diff --git a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
index c90f3ea209..d4f628e58b 100644
--- a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
@@ -150,15 +150,19 @@ class ExceptionCaster
 
                 if (!empty($f['class']) && is_subclass_of($f['class'], 'Twig_Template') && method_exists($f['class'], 'getDebugInfo')) {
                     $template = isset($f['object']) ? $f['object'] : new $f['class'](new \Twig_Environment(new \Twig_Loader_Filesystem()));
-
-                    try {
-                        $templateName = $template->getTemplateName();
-                        $templateSrc = explode("\n", method_exists($template, 'getSource') ? $template->getSource() : $template->getEnvironment()->getLoader()->getSource($templateName));
-                        $templateInfo = $template->getDebugInfo();
-                        if (isset($templateInfo[$f['line']])) {
-                            $src[$templateName.':'.$templateInfo[$f['line']]] = self::extractSource($templateSrc, $templateInfo[$f['line']], self::$srcContext);
+                    $templateName = $template->getTemplateName();
+                    $templateSrc = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getCode() : (method_exists($template, 'getSource') ? $template->getSource() : '');
+                    $templateInfo = $template->getDebugInfo();
+                    if (isset($templateInfo[$f['line']])) {
+                        if (method_exists($template, 'getSourceContext')) {
+                            $templateName = $template->getSourceContext()->getPath() ?: $templateName;
+                        }
+                        if ($templateSrc) {
+                            $templateSrc = explode("\n", $templateSrc);
+                            $src[$templateName.':'.$templateInfo[$f['line']]] = self::extractSource($templateSrc, $templateInfo[$f['line']], self::$srcContext);
+                        } else {
+                            $src[$templateName] = $templateInfo[$f['line']];
                         }
-                    } catch (\Twig_Error_Loader $e) {
                     }
                 }
             } else {
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
new file mode 100644
index 0000000000..d4d10b310a
--- /dev/null
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Tests\Caster;
+
+use Symfony\Component\VarDumper\Caster\FrameStub;
+use Symfony\Component\VarDumper\Test\VarDumperTestTrait;
+
+class ExceptionCasterTest extends \PHPUnit_Framework_TestCase
+{
+    use VarDumperTestTrait;
+
+    /**
+     * @requires function Twig_Template::getSourceContext
+     */
+    public function testFrameWithTwig()
+    {
+        require_once dirname(__DIR__).'/Fixtures/Twig.php';
+
+        $f = array(
+            new FrameStub(array(
+                'file' => dirname(__DIR__).'/Fixtures/Twig.php',
+                'line' => 19,
+                'class' => '__TwigTemplate_VarDumperFixture_u75a09',
+                'object' => new \__TwigTemplate_VarDumperFixture_u75a09(new \Twig_Environment(new \Twig_Loader_Filesystem())),
+            )),
+            new FrameStub(array(
+                'file' => dirname(__DIR__).'/Fixtures/Twig.php',
+                'line' => 19,
+                'class' => '__TwigTemplate_VarDumperFixture_u75a09',
+                'object' => new \__TwigTemplate_VarDumperFixture_u75a09(new \Twig_Environment(new \Twig_Loader_Filesystem()), null),
+            )),
+        );
+
+        $expectedDump = <<<'EODUMP'
+array:2 [
+  0 => {
+    class: "__TwigTemplate_VarDumperFixture_u75a09"
+    object: __TwigTemplate_VarDumperFixture_u75a09 {
+    %A
+    }
+    src: {
+      %sTwig.php:19: """
+            // line 2\n
+            throw new \Exception('Foobar');\n
+        }\n
+        """
+      bar.twig:2: """
+        foo bar\n
+          twig source\n
+        \n
+        """
+    }
+  }
+  1 => {
+    class: "__TwigTemplate_VarDumperFixture_u75a09"
+    object: __TwigTemplate_VarDumperFixture_u75a09 {
+    %A
+    }
+    src: {
+      %sTwig.php:19: """
+            // line 2\n
+            throw new \Exception('Foobar');\n
+        }\n
+        """
+      foo.twig:2: """
+        foo bar\n
+          twig source\n
+        \n
+        """
+    }
+  }
+]
+
+EODUMP;
+
+        $this->assertDumpMatchesFormat($expectedDump, $f);
+    }
+}
diff --git a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
index 9b00afd804..cf2d00d41a 100644
--- a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
@@ -228,6 +228,9 @@ EOTXT
         putenv('DUMP_STRING_LENGTH=');
     }
 
+    /**
+     * @requires function Twig_Template::getSourceContext
+     */
     public function testThrowingCaster()
     {
         $out = fopen('php://memory', 'r+b');
@@ -262,19 +265,6 @@ EOTXT
         rewind($out);
         $out = stream_get_contents($out);
 
-        if (method_exists($twig, 'getSource')) {
-            $twig = <<<EOTXT
-          foo.twig:2: """
-            foo bar\\n
-              twig source\\n
-            \\n
-            """
-
-EOTXT;
-        } else {
-            $twig = '';
-        }
-
         $r = defined('HHVM_VERSION') ? '' : '#%d';
         $this->assertStringMatchesFormat(
             <<<EOTXT
@@ -296,7 +286,12 @@ stream resource {@{$ref}
                 throw new \Exception('Foobar');\\n
             }\\n
             """
-{$twig}        }
+          bar.twig:2: """
+            foo bar\\n
+              twig source\\n
+            \\n
+            """
+        }
       }
       %d. Twig_Template->displayWithErrorHandling() ==> __TwigTemplate_VarDumperFixture_u75a09->doDisplay(): {
         src: {
diff --git a/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php b/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
index f25aac6553..7ffdd2bd54 100644
--- a/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
+++ b/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
@@ -3,14 +3,14 @@
 /* foo.twig */
 class __TwigTemplate_VarDumperFixture_u75a09 extends Twig_Template
 {
-    public function __construct(Twig_Environment $env)
+    private $filename;
+
+    public function __construct(Twig_Environment $env, $filename = 'bar.twig')
     {
         parent::__construct($env);
-
         $this->parent = false;
-
-        $this->blocks = array(
-        );
+        $this->blocks = array();
+        $this->filename = $filename;
     }
 
     protected function doDisplay(array $context, array $blocks = array())
@@ -26,14 +26,11 @@ class __TwigTemplate_VarDumperFixture_u75a09 extends Twig_Template
 
     public function getDebugInfo()
     {
-        return array (19 => 2);
+        return array(19 => 2);
     }
 
-    public function getSource()
+    public function getSourceContext()
     {
-        return "   foo bar
-     twig source
-
-";
+        return new Twig_Source("   foo bar\n     twig source\n\n", 'foo.twig', $this->filename);
     }
 }