Made method signatures compatible with their corresponding traits.

src/Symfony/Component/Cache/Adapter/Psr16Adapter.php

@@ -79,7 +79,7 @@ class Psr16Adapter extends AbstractAdapter implements PruneableInterface, Resett
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         return $this->pool->setMultiple($values, 0 === $lifetime ? null : $lifetime);
     }

src/Symfony/Component/Cache/Traits/AbstractTrait.php

@@ -78,7 +78,7 @@ trait AbstractTrait
      *
      * @return array|bool The identifiers that failed to be cached or a boolean stating if caching succeeded or not
      */
-    abstract protected function doSave(array $values, $lifetime);
+    abstract protected function doSave(array $values, ?int $lifetime);
 
     /**
      * {@inheritdoc}

src/Symfony/Component/Cache/Traits/ApcuTrait.php

@@ -101,7 +101,7 @@ trait ApcuTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         try {
             if (false === $failures = apcu_store($values, null, $lifetime)) {

src/Symfony/Component/Cache/Traits/DoctrineTrait.php

@@ -91,7 +91,7 @@ trait DoctrineTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         return $this->provider->saveMultiple($values, $lifetime);
     }

src/Symfony/Component/Cache/Traits/FilesystemTrait.php

@@ -91,7 +91,7 @@ trait FilesystemTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         $expiresAt = $lifetime ? (time() + $lifetime) : 0;
         $values = $this->marshaller->marshall($values, $failed);

src/Symfony/Component/Cache/Traits/MemcachedTrait.php

@@ -223,7 +223,7 @@ trait MemcachedTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         if (!$values = $this->marshaller->marshall($values, $failed)) {
             return $failed;

src/Symfony/Component/Cache/Traits/PdoTrait.php

@@ -275,7 +275,7 @@ trait PdoTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         if (!$values = $this->marshaller->marshall($values, $failed)) {
             return $failed;

src/Symfony/Component/Cache/Traits/PhpFilesTrait.php

@@ -194,7 +194,7 @@ trait PhpFilesTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         $ok = true;
         $expiry = $lifetime ? time() + $lifetime : 'PHP_INT_MAX';

src/Symfony/Component/Cache/Traits/RedisTrait.php

@@ -404,7 +404,7 @@ trait RedisTrait
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, $lifetime)
+    protected function doSave(array $values, ?int $lifetime)
     {
         if (!$values = $this->marshaller->marshall($values, $failed)) {
             return $failed;

src/Symfony/Component/HttpClient/Response/CurlResponse.php

@@ -15,6 +15,7 @@ use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpClient\Chunk\FirstChunk;
 use Symfony\Component\HttpClient\Chunk\InformationalChunk;
 use Symfony\Component\HttpClient\Exception\TransportException;
+use Symfony\Component\HttpClient\Internal\ClientState;
 use Symfony\Component\HttpClient\Internal\CurlClientState;
 use Symfony\Contracts\HttpClient\Exception\HttpExceptionInterface;
 use Symfony\Contracts\HttpClient\ResponseInterface;
@@ -242,8 +243,10 @@ final class CurlResponse implements ResponseInterface
 
     /**
      * {@inheritdoc}
+     *
+     * @param CurlClientState $multi
      */
-    private static function perform(CurlClientState $multi, array &$responses = null): void
+    private static function perform(ClientState $multi, array &$responses = null): void
     {
         if (self::$performing) {
             if ($responses) {
@@ -289,8 +292,10 @@ final class CurlResponse implements ResponseInterface
 
     /**
      * {@inheritdoc}
+     *
+     * @param CurlClientState $multi
      */
-    private static function select(CurlClientState $multi, float $timeout): int
+    private static function select(ClientState $multi, float $timeout): int
     {
         if (\PHP_VERSION_ID < 70123 || (70200 <= \PHP_VERSION_ID && \PHP_VERSION_ID < 70211)) {
             // workaround https://bugs.php.net/76480

src/Symfony/Component/HttpClient/Response/NativeResponse.php

@@ -14,6 +14,7 @@ namespace Symfony\Component\HttpClient\Response;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpClient\Chunk\FirstChunk;
 use Symfony\Component\HttpClient\Exception\TransportException;
+use Symfony\Component\HttpClient\Internal\ClientState;
 use Symfony\Component\HttpClient\Internal\NativeClientState;
 use Symfony\Contracts\HttpClient\Exception\HttpExceptionInterface;
 use Symfony\Contracts\HttpClient\ResponseInterface;
@@ -214,8 +215,10 @@ final class NativeResponse implements ResponseInterface
 
     /**
      * {@inheritdoc}
+     *
+     * @param NativeClientState $multi
      */
-    private static function perform(NativeClientState $multi, array &$responses = null): void
+    private static function perform(ClientState $multi, array &$responses = null): void
     {
         // List of native handles for stream_select()
         if (null !== $responses) {
@@ -326,8 +329,10 @@ final class NativeResponse implements ResponseInterface
 
     /**
      * {@inheritdoc}
+     *
+     * @param NativeClientState $multi
      */
-    private static function select(NativeClientState $multi, float $timeout): int
+    private static function select(ClientState $multi, float $timeout): int
     {
         $_ = [];