Merge branch '2.3' into 2.6

* 2.3:
  [2.3][Debug] Fix fatal-errors handling on HHVM
  Standardize the name of the exception variables
  [2.3] Static Code Analysis for Components
  Remove duplicated paths

Conflicts:
	src/Symfony/Component/Debug/ErrorHandler.php
	src/Symfony/Component/HttpFoundation/Session/Storage/MockArraySessionStorage.php
	src/Symfony/Component/Security/Acl/Dbal/AclProvider.php
	src/Symfony/Component/Security/Core/Authentication/Provider/UserAuthenticationProvider.php

Author: nicolas-grekas

Definition/ArrayNode.php

@@ -246,7 +246,7 @@ protected function finalizeValue($value)
 
             try {
                 $value[$name] = $child->finalize($value[$name]);
-            } catch (UnsetKeyException $unset) {
+            } catch (UnsetKeyException $e) {
                 unset($value[$name]);
             }
         }

Definition/BaseNode.php

@@ -307,14 +307,10 @@ final public function finalize($value)
         foreach ($this->finalValidationClosures as $closure) {
             try {
                 $value = $closure($value);
-            } catch (Exception $correctEx) {
-                throw $correctEx;
-            } catch (\Exception $invalid) {
-                throw new InvalidConfigurationException(sprintf(
-                    'Invalid configuration for path "%s": %s',
-                    $this->getPath(),
-                    $invalid->getMessage()
-                ), $invalid->getCode(), $invalid);
+            } catch (Exception $e) {
+                throw $e;
+            } catch (\Exception $e) {
+                throw new InvalidConfigurationException(sprintf('Invalid configuration for path "%s": %s', $this->getPath(), $e->getMessage()), $e->getCode(), $e);
             }
         }
 

Definition/PrototypedArrayNode.php

@@ -197,7 +197,7 @@ protected function finalizeValue($value)
             $this->prototype->setName($k);
             try {
                 $value[$k] = $this->prototype->finalize($v);
-            } catch (UnsetKeyException $unset) {
+            } catch (UnsetKeyException $e) {
                 unset($value[$k]);
             }
         }

FileLocator.php

@@ -53,6 +53,7 @@ public function locate($name, $currentPath = null, $first = true)
             array_unshift($paths, $currentPath);
         }
 
+        $paths = array_unique($paths);
         $filepaths = array();
 
         foreach ($paths as $path) {
@@ -68,7 +69,7 @@ public function locate($name, $currentPath = null, $first = true)
             throw new \InvalidArgumentException(sprintf('The file "%s" does not exist (in: %s).', $name, implode(', ', $paths)));
         }
 
-        return array_values(array_unique($filepaths));
+        return $filepaths;
     }
 
     /**