diff --git a/src/Symfony/Component/Process/ExecutableFinder.php b/src/Symfony/Component/Process/ExecutableFinder.php
index 3bf711149d..824457ce2a 100644
--- a/src/Symfony/Component/Process/ExecutableFinder.php
+++ b/src/Symfony/Component/Process/ExecutableFinder.php
@@ -79,7 +79,7 @@ class ExecutableFinder
         }
         foreach ($suffixes as $suffix) {
             foreach ($dirs as $dir) {
-                if (is_file($file = $dir.DIRECTORY_SEPARATOR.$name.$suffix) && ('\\' === DIRECTORY_SEPARATOR || is_executable($file))) {
+                if (@is_file($file = $dir.DIRECTORY_SEPARATOR.$name.$suffix) && ('\\' === DIRECTORY_SEPARATOR || is_executable($file))) {
                     return $file;
                 }
             }
diff --git a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
index 76c069dd06..2780c86a41 100644
--- a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
@@ -73,7 +73,7 @@ class ReflectionCaster
         $prefix = Caster::PREFIX_VIRTUAL;
 
         $a += array(
-            $prefix.'type' => $c->__toString(),
+            $prefix.'name' => method_exists('ReflectionType', 'getName') ? $c->getName() : $c->__toString(),
             $prefix.'allowsNull' => $c->allowsNull(),
             $prefix.'isBuiltin' => $c->isBuiltin(),
         );
@@ -157,7 +157,7 @@ class ReflectionCaster
         ));
 
         if (isset($a[$prefix.'returnType'])) {
-            $a[$prefix.'returnType'] = (string) $a[$prefix.'returnType'];
+            $a[$prefix.'returnType'] = method_exists('ReflectionType', 'getName') ? $a[$prefix.'returnType']->getName() : $a[$prefix.'returnType']->__toString();
         }
         if (isset($a[$prefix.'this'])) {
             $a[$prefix.'this'] = new CutStub($a[$prefix.'this']);
@@ -213,12 +213,13 @@ class ReflectionCaster
             'position' => 'getPosition',
             'isVariadic' => 'isVariadic',
             'byReference' => 'isPassedByReference',
+            'allowsNull' => 'allowsNull',
         ));
 
         try {
             if (method_exists($c, 'hasType')) {
                 if ($c->hasType()) {
-                    $a[$prefix.'typeHint'] = $c->getType()->__toString();
+                    $a[$prefix.'typeHint'] = method_exists('ReflectionType', 'getName') ? $c->getType()->getName() : $c->getType()->__toString();
                 }
             } else {
                 $v = explode(' ', $c->__toString(), 6);
@@ -231,15 +232,22 @@ class ReflectionCaster
                 $a[$prefix.'typeHint'] = $m[1];
             }
         }
+        if (!isset($a[$prefix.'typeHint'])) {
+            unset($a[$prefix.'allowsNull']);
+        }
 
         try {
             $a[$prefix.'default'] = $v = $c->getDefaultValue();
             if (method_exists($c, 'isDefaultValueConstant') && $c->isDefaultValueConstant()) {
                 $a[$prefix.'default'] = new ConstStub($c->getDefaultValueConstantName(), $v);
             }
+            if (null === $v) {
+                unset($a[$prefix.'allowsNull']);
+            }
         } catch (\ReflectionException $e) {
-            if (isset($a[$prefix.'typeHint']) && $c->allowsNull()) {
+            if (isset($a[$prefix.'typeHint']) && $c->allowsNull() && !method_exists('ReflectionType', 'getName')) {
                 $a[$prefix.'default'] = null;
+                unset($a[$prefix.'allowsNull']);
             }
         }