diff --git a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
index b182dad212..ab178ed42c 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
@@ -462,9 +462,8 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
      * All backend requests (cache passes, fetches, cache validations)
      * run through this method.
      *
-     * @param Request  $request A Request instance
-     * @param bool     $catch   Whether to catch exceptions or not
-     * @param Response $entry   A Response instance (the stale entry if present, null otherwise)
+     * @param bool          $catch Whether to catch exceptions or not
+     * @param Response|null $entry A Response instance (the stale entry if present, null otherwise)
      *
      * @return Response A Response instance
      */
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index 29dc398c54..7026ac3c7d 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -354,7 +354,7 @@ class Store implements StoreInterface
     {
         $path = $this->getPath($key);
 
-        return file_exists($path) ? file_get_contents($path) : null;
+        return file_exists($path) && false !== ($contents = file_get_contents($path)) ? $contents : null;
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index af7cd3a2e5..de917d1e22 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -503,10 +503,9 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             return;
         }
 
-        if ($this->debug) {
+        if ($collectDeprecations = $this->debug && !\defined('PHPUNIT_COMPOSER_INSTALL')) {
             $collectedLogs = [];
-            $previousHandler = \defined('PHPUNIT_COMPOSER_INSTALL');
-            $previousHandler = $previousHandler ?: set_error_handler(function ($type, $message, $file, $line) use (&$collectedLogs, &$previousHandler) {
+            $previousHandler = set_error_handler(function ($type, $message, $file, $line) use (&$collectedLogs, &$previousHandler) {
                 if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
                     return $previousHandler ? $previousHandler($type, $message, $file, $line) : false;
                 }
@@ -549,7 +548,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             $container = $this->buildContainer();
             $container->compile();
         } finally {
-            if ($this->debug && true !== $previousHandler) {
+            if ($collectDeprecations) {
                 restore_error_handler();
 
                 file_put_contents($cacheDir.'/'.$class.'Deprecations.log', serialize(array_values($collectedLogs)));
diff --git a/src/Symfony/Component/Intl/Collator/Collator.php b/src/Symfony/Component/Intl/Collator/Collator.php
index a1fe084fa5..79ffb072aa 100644
--- a/src/Symfony/Component/Intl/Collator/Collator.php
+++ b/src/Symfony/Component/Intl/Collator/Collator.php
@@ -70,7 +70,7 @@ class Collator
     const SORT_STRING = 1;
 
     /**
-     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      *
      * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      */
@@ -84,7 +84,7 @@ class Collator
     /**
      * Static constructor.
      *
-     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      *
      * @return self
      *
diff --git a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
index 390a98b962..79c025ce45 100644
--- a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
+++ b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
@@ -118,7 +118,7 @@ class IntlDateFormatter
     private $timeZoneId;
 
     /**
-     * @param string                                  $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null                             $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      * @param int|null                                $datetype Type of date formatting, one of the format type constants
      * @param int|null                                $timetype Type of time formatting, one of the format type constants
      * @param \IntlTimeZone|\DateTimeZone|string|null $timezone Timezone identifier
@@ -152,7 +152,7 @@ class IntlDateFormatter
     /**
      * Static constructor.
      *
-     * @param string                                  $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null                             $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      * @param int|null                                $datetype Type of date formatting, one of the format type constants
      * @param int|null                                $timetype Type of time formatting, one of the format type constants
      * @param \IntlTimeZone|\DateTimeZone|string|null $timezone Timezone identifier
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index 9f644ef8cd..0c14a0ffdb 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -241,13 +241,13 @@ class NumberFormatter
     ];
 
     /**
-     * @param string $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
-     * @param int    $style   Style of the formatting, one of the format style constants.
-     *                        The only supported styles are NumberFormatter::DECIMAL
-     *                        and NumberFormatter::CURRENCY.
-     * @param string $pattern Not supported. A pattern string in case $style is NumberFormat::PATTERN_DECIMAL or
-     *                        NumberFormat::PATTERN_RULEBASED. It must conform to  the syntax
-     *                        described in the ICU DecimalFormat or ICU RuleBasedNumberFormat documentation
+     * @param string|null $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param int         $style   Style of the formatting, one of the format style constants.
+     *                             The only supported styles are NumberFormatter::DECIMAL
+     *                             and NumberFormatter::CURRENCY.
+     * @param string      $pattern Not supported. A pattern string in case $style is NumberFormat::PATTERN_DECIMAL or
+     *                             NumberFormat::PATTERN_RULEBASED. It must conform to  the syntax
+     *                             described in the ICU DecimalFormat or ICU RuleBasedNumberFormat documentation
      *
      * @see http://www.php.net/manual/en/numberformatter.create.php
      * @see http://www.icu-project.org/apiref/icu4c/classDecimalFormat.html#_details
diff --git a/src/Symfony/Component/Lock/Store/CombinedStore.php b/src/Symfony/Component/Lock/Store/CombinedStore.php
index 6038b3be93..01c8785d01 100644
--- a/src/Symfony/Component/Lock/Store/CombinedStore.php
+++ b/src/Symfony/Component/Lock/Store/CombinedStore.php
@@ -94,7 +94,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
 
     public function waitAndSave(Key $key)
     {
-        throw new NotSupportedException(sprintf('The store "%s" does not supports blocking locks.', \get_class($this)));
+        throw new NotSupportedException(sprintf('The store "%s" does not support blocking locks.', \get_class($this)));
     }
 
     /**
diff --git a/src/Symfony/Component/Lock/Store/MemcachedStore.php b/src/Symfony/Component/Lock/Store/MemcachedStore.php
index 9b84303fc3..891cb9e51d 100644
--- a/src/Symfony/Component/Lock/Store/MemcachedStore.php
+++ b/src/Symfony/Component/Lock/Store/MemcachedStore.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\Lock\Store;
 
 use Symfony\Component\Lock\Exception\InvalidArgumentException;
 use Symfony\Component\Lock\Exception\LockConflictedException;
+use Symfony\Component\Lock\Exception\NotSupportedException;
 use Symfony\Component\Lock\Key;
 use Symfony\Component\Lock\StoreInterface;
 
@@ -70,7 +71,7 @@ class MemcachedStore implements StoreInterface
 
     public function waitAndSave(Key $key)
     {
-        throw new InvalidArgumentException(sprintf('The store "%s" does not supports blocking locks.', \get_class($this)));
+        throw new NotSupportedException(sprintf('The store "%s" does not support blocking locks.', \get_class($this)));
     }
 
     /**
diff --git a/src/Symfony/Component/Lock/Store/RedisStore.php b/src/Symfony/Component/Lock/Store/RedisStore.php
index 39360de45c..7efa0026ec 100644
--- a/src/Symfony/Component/Lock/Store/RedisStore.php
+++ b/src/Symfony/Component/Lock/Store/RedisStore.php
@@ -15,6 +15,7 @@ use Symfony\Component\Cache\Traits\RedisClusterProxy;
 use Symfony\Component\Cache\Traits\RedisProxy;
 use Symfony\Component\Lock\Exception\InvalidArgumentException;
 use Symfony\Component\Lock\Exception\LockConflictedException;
+use Symfony\Component\Lock\Exception\NotSupportedException;
 use Symfony\Component\Lock\Key;
 use Symfony\Component\Lock\StoreInterface;
 
@@ -76,7 +77,7 @@ class RedisStore implements StoreInterface
      */
     public function waitAndSave(Key $key)
     {
-        throw new InvalidArgumentException(sprintf('The store "%s" does not supports blocking locks.', \get_class($this)));
+        throw new NotSupportedException(sprintf('The store "%s" does not support blocking locks.', \get_class($this)));
     }
 
     /**