Merge branch '4.2'

* 4.2: (26 commits)
  Apply php-cs-fixer rule for array_key_exists()
  [Cache] fix warming up cache.system and apcu
  [Security] Change FormAuthenticator if condition
  handles multi-byte characters in autocomplete
  speed up tests running them without debug flag
  [Translations] added missing Croatian validators
  Fix getItems() performance issue with RedisCluster (php-redis)
  [VarDumper] Keep a ref to objects to ensure their handle cannot be reused while cloning
  IntegerType: reject submitted non-integer numbers
  be keen to newcomers
  [HttpKernel] Fix possible infinite loop of exceptions
  fixed CS
  [Validator] Added missing translations for Afrikaans
  do not validate non-submitted form fields in PATCH requests
  Update usage example in ArrayInput doc block.
  [Console] Prevent ArgvInput::getFirstArgument() from returning an option value
  [Validator] Fixed duplicate UUID
  fixed CS
  [EventDispatcher] Fix unknown priority
  Avoid mutating the Finder when building the iterator
  ...

Author: nicolas-grekas

Debug/OptionsResolverIntrospector.php

@@ -32,7 +32,7 @@ public function __construct(OptionsResolver $optionsResolver)
                 throw new UndefinedOptionsException(sprintf('The option "%s" does not exist.', $option));
             }
 
-            if (!array_key_exists($option, $this->{$property})) {
+            if (!\array_key_exists($option, $this->{$property})) {
                 throw new NoConfigurationException($message);
             }
 

OptionsResolver.php

@@ -219,7 +219,7 @@ public function setDefault($option, $value)
         // to resolve options with lazy closures, normalizers or validation
         // rules, none of which can exist for undefined options
         // If the option was resolved before, update the resolved value
-        if (!isset($this->defined[$option]) || array_key_exists($option, $this->resolved)) {
+        if (!isset($this->defined[$option]) || \array_key_exists($option, $this->resolved)) {
             $this->resolved[$option] = $value;
         }
 
@@ -259,7 +259,7 @@ public function setDefaults(array $defaults)
      */
     public function hasDefault($option)
     {
-        return array_key_exists($option, $this->defaults);
+        return \array_key_exists($option, $this->defaults);
     }
 
     /**
@@ -324,7 +324,7 @@ public function getRequiredOptions()
      */
     public function isMissing($option)
     {
-        return isset($this->required[$option]) && !array_key_exists($option, $this->defaults);
+        return isset($this->required[$option]) && !\array_key_exists($option, $this->defaults);
     }
 
     /**
@@ -800,7 +800,7 @@ public function offsetGet($option/*, bool $triggerDeprecation = true*/)
         $triggerDeprecation = 1 === \func_num_args() || \func_get_arg(1);
 
         // Shortcut for resolved options
-        if (isset($this->resolved[$option]) || array_key_exists($option, $this->resolved)) {
+        if (isset($this->resolved[$option]) || \array_key_exists($option, $this->resolved)) {
             if ($triggerDeprecation && isset($this->deprecated[$option]) && (isset($this->given[$option]) || $this->calling) && \is_string($this->deprecated[$option])) {
                 @trigger_error(strtr($this->deprecated[$option], ['%name%' => $option]), E_USER_DEPRECATED);
             }
@@ -809,7 +809,7 @@ public function offsetGet($option/*, bool $triggerDeprecation = true*/)
         }
 
         // Check whether the option is set at all
-        if (!isset($this->defaults[$option]) && !array_key_exists($option, $this->defaults)) {
+        if (!isset($this->defaults[$option]) && !\array_key_exists($option, $this->defaults)) {
             if (!isset($this->defined[$option])) {
                 throw new NoSuchOptionException(sprintf('The option "%s" does not exist. Defined options are: "%s".', $option, implode('", "', array_keys($this->defined))));
             }
@@ -1033,7 +1033,7 @@ public function offsetExists($option)
             throw new AccessException('Array access is only supported within closures of lazy options and normalizers.');
         }
 
-        return array_key_exists($option, $this->defaults);
+        return \array_key_exists($option, $this->defaults);
     }
 
     /**