Fix deprecation when using "static" in callables (#1403)

* Be sure that position always have type integer

* Annotate properly return types for SPL interfaces implementation

It is allows avoiding deprecation messages from `symfony/error-handler` like a '[info] User Deprecated: Method "Iterator::rewind()" might add "void" as a native return type declaration in the future. Do the same in implementation "Predis\Collection\Iterator\CursorBasedIterator" now to avoid errors or add an explicit @return annotation to suppress this message.'

Fixed via `symfony/error-handler` patch script: ` SYMFONY_PATCH_TYPE_DECLARATIONS="force=phpdoc&php=5.3" ./vendor/bin/patch-type-declarations` and some additional manual work

Some details about why this is necessary and how checks with trigger deprecations works: https://wouterj.nl/2021/09/symfony-6-native-typing

.gitattributes

@@ -11,3 +11,5 @@
 /.travis.yml export-ignore
 /phpunit.xml.dist export-ignore
 /phpunit.xml.travisci export-ignore
+/CHANGELOG.md export-ignore
+/CONTRIBUTING.md export-ignore

.travis.yml

@@ -1,19 +1,21 @@
 language: php
-sudo: false
+
 branches:
   except:
-    - v0.5
-    - v0.6
-    - v0.6-PHP_5.2
-    - documentation
+    - main
+    - v2.0
+
 before_install:
   - docker run -d --rm -p 127.0.0.1:6379:6379 redis:3
+
 before_script:
   - phpenv config-rm xdebug.ini
   - composer self-update
   - composer install --no-interaction --prefer-source --dev
+
 script:
   - travis_retry vendor/bin/phpunit -c phpunit.xml.travisci
+
 matrix:
   fast_finish: true
   include:
@@ -32,6 +34,3 @@ matrix:
     - php: 7.3
     - php: 7.4
     - php: 8.0
-    - php: nightly
-  allow_failures:
-    - php: nightly

CHANGELOG.md

@@ -1,3 +1,23 @@
+v1.1.10 (2022-01-05)
+================================================================================
+
+- __FIX__: Avoid PHP 8.1 deprecation notices in `Session/Handler`
+- __FIX__: Fixed "Cannot use object of type Predis\Response\Error as array"
+error in `Connection/Aggregate/SentinelReplication`
+
+
+v1.1.9 (2021-10-05)
+================================================================================
+
+- __FIX__: Fixed PHP 8.1 compatibility in `StreamConnection`
+
+
+v1.1.8 (2021-09-29)
+================================================================================
+
+- __FIX__: Ensure compatibility with PHP 8.1.
+
+
 v1.1.7 (2021-04-04)
 ================================================================================
 

VERSION

@@ -1 +1 @@
-1.1.7
+1.1.11-dev

package.ini

@@ -10,8 +10,8 @@ name        = "Predis"
 desc        = "Flexible and feature-complete Redis client for PHP and HHVM"
 homepage    = "http://github.com/nrk/predis"
 license     = "MIT"
-version     = "1.1.7"
-stability   = "stable"
+version     = "1.1.11"
+stability   = "devel"
 channel     = "pear.nrk.io"
 
 author      = "Daniele Alessandri \"nrk\" <suppakilla@gmail.com>"

src/Client.php

@@ -40,7 +40,7 @@ use Predis\Transaction\MultiExec as MultiExecTransaction;
  */
 class Client implements ClientInterface, \IteratorAggregate
 {
-    const VERSION = '1.1.7';
+    const VERSION = '1.1.11-dev';
 
     protected $connection;
     protected $options;
@@ -529,6 +529,7 @@ class Client implements ClientInterface, \IteratorAggregate
     /**
      * @return \Traversable<string, static>
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         $clients = array();

src/Collection/Iterator/CursorBasedIterator.php

@@ -92,7 +92,7 @@ abstract class CursorBasedIterator implements \Iterator
     {
         $options = array();
 
-        if (strlen($this->match) > 0) {
+        if (strlen(strval($this->match)) > 0) {
             $options['MATCH'] = $this->match;
         }
 
@@ -138,7 +138,9 @@ abstract class CursorBasedIterator implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->reset();
@@ -147,7 +149,9 @@ abstract class CursorBasedIterator implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->current;
@@ -155,7 +159,9 @@ abstract class CursorBasedIterator implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->position;
@@ -163,7 +169,9 @@ abstract class CursorBasedIterator implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         tryFetch: {
@@ -183,7 +191,9 @@ abstract class CursorBasedIterator implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return $this->valid;

src/Collection/Iterator/ListKey.php

@@ -127,7 +127,9 @@ class ListKey implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         $this->reset();
@@ -136,7 +138,9 @@ class ListKey implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->current;
@@ -144,7 +148,9 @@ class ListKey implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->position;
@@ -152,7 +158,9 @@ class ListKey implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         if (!$this->elements && $this->fetchmore) {
@@ -168,7 +176,9 @@ class ListKey implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return $this->valid;

src/Command/Command.php

@@ -104,7 +104,7 @@ abstract class Command implements CommandInterface
      */
     public static function normalizeArguments(array $arguments)
     {
-        if (count($arguments) === 1 && is_array($arguments[0])) {
+        if (count($arguments) === 1 && isset($arguments[0]) && is_array($arguments[0])) {
             return $arguments[0];
         }
 

src/Command/Processor/KeyPrefixProcessor.php

@@ -197,7 +197,13 @@ class KeyPrefixProcessor implements ProcessorInterface
         if ($command instanceof PrefixableCommandInterface) {
             $command->prefixKeys($this->prefix);
         } elseif (isset($this->commands[$commandID = strtoupper($command->getId())])) {
-            call_user_func($this->commands[$commandID], $command, $this->prefix);
+            $callable = $this->commands[$commandID];
+
+            if (is_string($callable) && 0 === strpos($callable, 'static::')) {
+                $callable = substr_replace($callable, get_class($this), 0, 6);
+            }
+
+            call_user_func($callable, $command, $this->prefix);
         }
     }
 

src/Command/Processor/ProcessorChain.php

@@ -91,6 +91,7 @@ class ProcessorChain implements \ArrayAccess, ProcessorInterface
     /**
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($index)
     {
         return isset($this->processors[$index]);
@@ -98,7 +99,9 @@ class ProcessorChain implements \ArrayAccess, ProcessorInterface
 
     /**
      * {@inheritdoc}
+     * @return ProcessorInterface|null
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($index)
     {
         return $this->processors[$index];
@@ -106,7 +109,9 @@ class ProcessorChain implements \ArrayAccess, ProcessorInterface
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($index, $processor)
     {
         if (!$processor instanceof ProcessorInterface) {
@@ -121,7 +126,9 @@ class ProcessorChain implements \ArrayAccess, ProcessorInterface
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($index)
     {
         unset($this->processors[$index]);

src/Command/ServerSentinel.php

@@ -31,7 +31,10 @@ class ServerSentinel extends Command
      */
     public function parseResponse($data)
     {
-        switch (strtolower($this->getArgument(0))) {
+        $argument = $this->getArgument(0);
+        $argument = is_null($argument) ? null : strtolower($argument);
+
+        switch ($argument) {
             case 'masters':
             case 'slaves':
                 return self::processMastersOrSlaves($data);

src/CommunicationException.php

@@ -34,7 +34,12 @@ abstract class CommunicationException extends PredisException
         $code = null,
         \Exception $innerException = null
     ) {
-        parent::__construct($message, $code, $innerException);
+        parent::__construct(
+            is_null($message) ? '' : $message,
+            is_null($code) ? 0 : $code,
+            $innerException
+        );
+
         $this->connection = $connection;
     }
 

src/Connection/Aggregate/PredisCluster.php

@@ -178,6 +178,7 @@ class PredisCluster implements ClusterInterface, \IteratorAggregate, \Countable
     /**
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->pool);
@@ -186,6 +187,7 @@ class PredisCluster implements ClusterInterface, \IteratorAggregate, \Countable
     /**
      * @return \Traversable<string|int, NodeConnectionInterface>
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new \ArrayIterator($this->pool);

src/Connection/Aggregate/RedisCluster.php

@@ -602,6 +602,7 @@ class RedisCluster implements ClusterInterface, \IteratorAggregate, \Countable
     /**
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->pool);
@@ -610,6 +611,7 @@ class RedisCluster implements ClusterInterface, \IteratorAggregate, \Countable
     /**
      * @return \Traversable<int, NodeConnectionInterface>
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         if ($this->useClusterSlots) {

src/Connection/Aggregate/SentinelReplication.php

@@ -20,6 +20,7 @@ use Predis\Connection\NodeConnectionInterface;
 use Predis\Connection\Parameters;
 use Predis\Replication\ReplicationStrategy;
 use Predis\Replication\RoleException;
+use Predis\Response\Error;
 use Predis\Response\ErrorInterface as ErrorResponseInterface;
 use Predis\Response\ServerException;
 
@@ -523,13 +524,17 @@ class SentinelReplication implements ReplicationInterface
      * @param NodeConnectionInterface $connection Connection to a redis server.
      * @param string                  $role       Expected role of the server ("master", "slave" or "sentinel").
      *
-     * @throws RoleException
+     * @throws RoleException|ConnectionException
      */
     protected function assertConnectionRole(NodeConnectionInterface $connection, $role)
     {
         $role = strtolower($role);
         $actualRole = $connection->executeCommand(RawCommand::create('ROLE'));
 
+        if ($actualRole instanceof Error) {
+            throw new ConnectionException($connection, $actualRole->getMessage());
+        }
+
         if ($role !== $actualRole[0]) {
             throw new RoleException($connection, "Expected $role but got $actualRole[0] [$connection]");
         }

src/Connection/PhpiredisStreamConnection.php

@@ -123,8 +123,9 @@ class PhpiredisStreamConnection extends StreamConnection
     {
         $socket = null;
         $timeout = (isset($parameters->timeout) ? (float) $parameters->timeout : 5.0);
+        $context = stream_context_create();
 
-        $resource = @stream_socket_client($address, $errno, $errstr, $timeout, $flags);
+        $resource = @stream_socket_client($address, $errno, $errstr, $timeout, $flags, $context);
 
         if (!$resource) {
             $this->onConnectionError(trim($errstr), $errno);

src/Connection/StreamConnection.php

@@ -123,8 +123,9 @@ class StreamConnection extends AbstractConnection
     protected function createStreamSocket(ParametersInterface $parameters, $address, $flags)
     {
         $timeout = (isset($parameters->timeout) ? (float) $parameters->timeout : 5.0);
+        $context = stream_context_create();
 
-        if (!$resource = @stream_socket_client($address, $errno, $errstr, $timeout, $flags)) {
+        if (!$resource = @stream_socket_client($address, $errno, $errstr, $timeout, $flags, $context)) {
             $this->onConnectionError(trim($errstr), $errno);
         }
 
@@ -288,7 +289,7 @@ class StreamConnection extends AbstractConnection
         $socket = $this->getResource();
 
         while (($length = strlen($buffer)) > 0) {
-            $written = @fwrite($socket, $buffer);
+            $written = is_resource($socket) ? @fwrite($socket, $buffer) : false;
 
             if ($length === $written) {
                 return;
@@ -332,7 +333,7 @@ class StreamConnection extends AbstractConnection
                 $bytesLeft = ($size += 2);
 
                 do {
-                    $chunk = fread($socket, min($bytesLeft, 4096));
+                    $chunk = is_resource($socket) ? fread($socket, min($bytesLeft, 4096)) : false;
 
                     if ($chunk === false || $chunk === '') {
                         $this->onConnectionError('Error while reading bytes from the server.');
@@ -387,7 +388,7 @@ class StreamConnection extends AbstractConnection
         $buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
 
         foreach ($arguments as $argument) {
-            $arglen = strlen($argument);
+            $arglen = strlen(strval($argument));
             $buffer .= "\${$arglen}\r\n{$argument}\r\n";
         }
 

src/Monitor/Consumer.php

@@ -24,7 +24,7 @@ class Consumer implements \Iterator
 {
     private $client;
     private $valid;
-    private $position;
+    private $position = 0;
 
     /**
      * @param ClientInterface $client Client instance used by the consumer.
@@ -90,7 +90,9 @@ class Consumer implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         // NOOP
@@ -101,6 +103,7 @@ class Consumer implements \Iterator
      *
      * @return object
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->getValue();
@@ -108,7 +111,9 @@ class Consumer implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->position;
@@ -116,7 +121,9 @@ class Consumer implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         ++$this->position;
@@ -127,6 +134,7 @@ class Consumer implements \Iterator
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return $this->valid;

src/Pipeline/Pipeline.php

@@ -225,6 +225,19 @@ class Pipeline implements ClientContextInterface
         return $this->responses;
     }
 
+    /**
+     * Clear the buffer holding all of the commands and responses.
+     *
+     * @return $this
+     */
+    public function clear()
+    {
+        $this->responses = array();
+        $this->pipeline = new \SplQueue();
+
+        return $this;
+    }
+
     /**
      * Returns if the pipeline should throw exceptions on server errors.
      *

src/PubSub/AbstractConsumer.php

@@ -30,7 +30,7 @@ abstract class AbstractConsumer implements \Iterator
     const STATUS_SUBSCRIBED = 2;  // 0b0010
     const STATUS_PSUBSCRIBED = 4; // 0b0100
 
-    private $position = null;
+    private $position = 0;
     private $statusFlags = self::STATUS_VALID;
 
     /**
@@ -150,7 +150,9 @@ abstract class AbstractConsumer implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         // NOOP
@@ -160,8 +162,9 @@ abstract class AbstractConsumer implements \Iterator
      * Returns the last message payload retrieved from the server and generated
      * by one of the active subscriptions.
      *
-     * @return array
+     * @return \stdClass
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->getValue();
@@ -169,7 +172,9 @@ abstract class AbstractConsumer implements \Iterator
 
     /**
      * {@inheritdoc}
+     * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->position;
@@ -178,6 +183,7 @@ abstract class AbstractConsumer implements \Iterator
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         if ($this->valid()) {
@@ -192,6 +198,7 @@ abstract class AbstractConsumer implements \Iterator
      *
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         $isValid = $this->isFlagSet(self::STATUS_VALID);
@@ -213,7 +220,7 @@ abstract class AbstractConsumer implements \Iterator
      * Waits for a new message from the server generated by one of the active
      * subscriptions and returns it when available.
      *
-     * @return array
+     * @return \stdClass
      */
     abstract protected function getValue();
 }

src/PubSub/Consumer.php

@@ -16,6 +16,8 @@ use Predis\ClientInterface;
 use Predis\Command\Command;
 use Predis\Connection\AggregateConnectionInterface;
 use Predis\NotSupportedException;
+use Predis\Response\ServerException;
+use Predis\Response\Error;
 
 /**
  * PUB/SUB consumer abstraction.
@@ -116,6 +118,10 @@ class Consumer extends AbstractConsumer
     {
         $response = $this->client->getConnection()->read();
 
+        if ($response instanceof Error) {
+            throw new ServerException($response->getMessage());
+        }
+
         switch ($response[0]) {
             case self::SUBSCRIBE:
             case self::UNSUBSCRIBE:

src/Replication/ReplicationStrategy.php

@@ -62,7 +62,8 @@ class ReplicationStrategy
         }
 
         if (($eval = $id === 'EVAL') || $id === 'EVALSHA') {
-            $sha1 = $eval ? sha1($command->getArgument(0)) : $command->getArgument(0);
+            $argument = $command->getArgument(0);
+            $sha1 = $eval ? sha1(strval($argument)) : $argument;
 
             if (isset($this->readonlySHA1[$sha1])) {
                 if (true === $readonly = $this->readonlySHA1[$sha1]) {

src/Response/Iterator/MultiBulkIterator.php

@@ -33,7 +33,9 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         // NOOP
@@ -41,7 +43,9 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
 
     /**
      * {@inheritdoc}
+     * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return $this->current;
@@ -49,7 +53,9 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
 
     /**
      * {@inheritdoc}
+     * @return int
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return $this->position;
@@ -57,7 +63,9 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
 
     /**
      * {@inheritdoc}
+     * @return void
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         if (++$this->position < $this->size) {
@@ -67,7 +75,9 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return $this->position < $this->size;
@@ -82,6 +92,7 @@ abstract class MultiBulkIterator implements \Iterator, \Countable, ResponseInter
      *
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return $this->size;

src/Response/Iterator/MultiBulkTuple.php

@@ -60,7 +60,9 @@ class MultiBulkTuple extends MultiBulk implements \OuterIterator
 
     /**
      * {@inheritdoc}
+     * @return \Iterator
      */
+    #[\ReturnTypeWillChange]
     public function getInnerIterator()
     {
         return $this->iterator;

src/Session/Handler.php

@@ -64,7 +64,9 @@ class Handler implements \SessionHandlerInterface
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function open($save_path, $session_id)
     {
         // NOOP
@@ -73,7 +75,9 @@ class Handler implements \SessionHandlerInterface
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function close()
     {
         // NOOP
@@ -82,7 +86,9 @@ class Handler implements \SessionHandlerInterface
 
     /**
      * {@inheritdoc}
+     * @return int|bool
      */
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
         // NOOP
@@ -91,7 +97,9 @@ class Handler implements \SessionHandlerInterface
 
     /**
      * {@inheritdoc}
+     * @return string
      */
+    #[\ReturnTypeWillChange]
     public function read($session_id)
     {
         if ($data = $this->client->get($session_id)) {
@@ -102,7 +110,9 @@ class Handler implements \SessionHandlerInterface
     }
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function write($session_id, $session_data)
     {
         $this->client->setex($session_id, $this->ttl, $session_data);
@@ -112,7 +122,9 @@ class Handler implements \SessionHandlerInterface
 
     /**
      * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function destroy($session_id)
     {
         $this->client->del($session_id);

src/Transaction/AbortedMultiExecException.php

@@ -29,7 +29,7 @@ class AbortedMultiExecException extends PredisException
      */
     public function __construct(MultiExec $transaction, $message, $code = null)
     {
-        parent::__construct($message, $code);
+        parent::__construct($message, is_null($code) ? 0 : $code);
         $this->transaction = $transaction;
     }
 

tests/Predis/Pipeline/PipelineTest.php

@@ -234,6 +234,59 @@ class PipelineTest extends PredisTestCase
         $this->assertSame(array('one', 'two', 'three', 'four'), $pipeline->execute());
     }
 
+    /**
+     * @group disconnected
+     */
+    public function testClearBuffer()
+    {
+        $connection = $this->getMock('Predis\Connection\NodeConnectionInterface');
+        $connection->expects($this->never())
+            ->method('writeRequest');
+        $connection->expects($this->never())
+            ->method('readResponse')
+            ->will($this->returnCallback($this->getReadCallback()));
+
+        $pipeline = new Pipeline(new Client($connection));
+
+        $pipeline->echo('one');
+        $pipeline->echo('two');
+
+        $pipeline->clear();
+
+        $this->assertSame(array(), $pipeline->execute());
+    }
+
+    /**
+     * @group disconnected
+     */
+    public function testClearResponses()
+    {
+        $connection = $this->getMock('Predis\Connection\NodeConnectionInterface');
+        $connection->expects($this->exactly(4))
+            ->method('writeRequest');
+        $connection->expects($this->exactly(4))
+            ->method('readResponse')
+            ->will($this->returnCallback($this->getReadCallback()));
+
+        $pipeline = new Pipeline(new Client($connection));
+
+        $pipeline->echo('one');
+        $pipeline->echo('two');
+
+        $this->assertSame(array('one', 'two'), $pipeline->execute());
+
+        $pipeline->clear();
+
+        $pipeline->echo('three');
+        $pipeline->echo('four');
+
+        $this->assertSame(array('three', 'four'), $pipeline->execute());
+
+        $pipeline->clear();
+
+        $this->assertSame(array(), $pipeline->execute());
+    }
+
     /**
      * @group disconnected
      */

tests/Predis/PubSub/ConsumerTest.php

@@ -426,4 +426,32 @@ class ConsumerTest extends PredisTestCase
             exit(0);
         }
     }
+
+    /**
+     * @group connected
+     * @expectedException \Predis\Response\ServerException
+     */
+    public function testInvalidSubscriptionThrowsServerException()
+    {
+        $parameters = array(
+            'host' => REDIS_SERVER_HOST,
+            'port' => REDIS_SERVER_PORT,
+            'database' => REDIS_SERVER_DBNUM,
+            'read_write_timeout' => -1, // -1 to set blocking reads
+        );
+
+        $options = array('profile' => REDIS_SERVER_VERSION);
+
+        $consumer = new Client($parameters, $options);
+        $consumer->connect();
+
+        $pubsub = $consumer->pubSubLoop();
+
+        // calling psubscribe with invalid empty parameter list
+        $pubsub->psubscribe(array());
+
+        foreach ($pubsub as $message) {
+            // should trigger the ServerException
+        }
+    }
 }

tests/apply-patches.php

@@ -7,6 +7,7 @@ $patches = array(
     'phpunit_mock_objects.patch' => 'phpunit/phpunit-mock-objects',
     'phpunit_php7.patch' => 'phpunit/phpunit',
     'phpunit_php8.patch' => 'phpunit/phpunit',
+    'phpunit_php81.patch' => 'phpunit/phpunit',
 );
 
 foreach ($patches as $patch => $package) {

tests/phpunit_php81.patch

@@ -0,0 +1,50 @@
+diff --git a/src/Util/Configuration.php b/src/Util/Configuration.php
+index b2f7a7bd0c6..1a1a444d378 100644
+--- a/src/Util/Configuration.php
++++ b/src/Util/Configuration.php
+@@ -514,22 +514,17 @@ public function handlePHPConfiguration()
+ 
+         foreach (array('var', 'post', 'get', 'cookie', 'server', 'files', 'request') as $array) {
+             // See https://github.com/sebastianbergmann/phpunit/issues/277
+-            switch ($array) {
+-                case 'var':
+-                    $target = &$GLOBALS;
+-                    break;
+-
+-                case 'server':
+-                    $target = &$_SERVER;
+-                    break;
+-
+-                default:
+-                    $target = &$GLOBALS['_' . strtoupper($array)];
+-                    break;
+-            }
+-
+             foreach ($configuration[$array] as $name => $value) {
+-                $target[$name] = $value;
++                switch ($array) {
++                    case 'var':
++                        $GLOBALS[$name] = $value;
++                        break;
++                    case 'server':
++                        $_SERVER[$name] = $value;
++                        break;
++                    default:
++                        $GLOBALS['_' . strtoupper($array)][$name] = $value;
++                }
+             }
+         }
+ 
+diff --git a/src/Util/Getopt.php b/src/Util/Getopt.php
+index 370e97d73f8..5bd8553970b 100644
+--- a/src/Util/Getopt.php
++++ b/src/Util/Getopt.php
+@@ -144,7 +144,7 @@ protected static function parseLongOption($arg, $long_options, &$opts, &$args)
+ 
+             if (substr($long_opt, -1) == '=') {
+                 if (substr($long_opt, -2) != '==') {
+-                    if (!strlen($opt_arg)) {
++                    if (null === $opt_arg || strlen($opt_arg) < 1) {
+                         $opt_arg = current($args);
+                         next($args);
+                         if (!($opt_arg)) {