Internal error: Call to a member function dispatch() on null

[mvhirsch]

I'm running into a similar issue - same conclusion. It's broken since v1.3.29 and my wild guess would be this commit 4490e56

Here's my stack trace:

 Internal error: Internal error: Call to a member function dispatch() on null in file /path/to/project/src/VideoBundle/Command/FixSegmentsCompleteCommand.php                                                           
                                                                                                                                                                                                                                     
 Post the following stack trace to https://github.com/phpstan/phpstan/issues/new?template=Bug_report.md:                                                                                                                             
 #0 /path/to/project/vendor/doctrine/orm/lib/Doctrine/ORM/Query/AST/IndexBy.php(51): PHPStan\Type\Doctrine\Query\QueryResultTypeWalker->walkIndexBy()                                                                   
 #1 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/Query/QueryResultTypeWalker.php(316): Doctrine\ORM\Query\AST\IndexBy->dispatch()                                                                 
 #2 /path/to/project/vendor/doctrine/orm/lib/Doctrine/ORM/Query/AST/IdentificationVariableDeclaration.php(65): PHPStan\Type\Doctrine\Query\QueryResultTypeWalker->walkIdentificationVariableDeclaration()               
 #3 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/Query/QueryResultTypeWalker.php(304): Doctrine\ORM\Query\AST\IdentificationVariableDeclaration->dispatch()                                       
 #4 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/Query/QueryResultTypeWalker.php(180): PHPStan\Type\Doctrine\Query\QueryResultTypeWalker->walkFromClause()                                        
 #5 /path/to/project/vendor/doctrine/orm/lib/Doctrine/ORM/Query/Exec/SingleSelectExecutor.php(42): PHPStan\Type\Doctrine\Query\QueryResultTypeWalker->walkSelectStatement()                                             
 #6 /path/to/project/vendor/doctrine/orm/lib/Doctrine/ORM/Query/SqlWalker.php(288): Doctrine\ORM\Query\Exec\SingleSelectExecutor->__construct()                                                                         
 #7 /path/to/project/vendor/doctrine/orm/lib/Doctrine/ORM/Query/Parser.php(411): Doctrine\ORM\Query\SqlWalker->getExecutor()                                                                                            
 #8 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/Query/QueryResultTypeWalker.php(119): Doctrine\ORM\Query\Parser->parse()                                                                         
 #9 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/QueryBuilder/QueryBuilderGetQueryDynamicReturnTypeExtension.php(163): PHPStan\Type\Doctrine\Query\QueryResultTypeWalker::walk()                  
 #10 /path/to/project/vendor/phpstan/phpstan-doctrine/src/Type/Doctrine/QueryBuilder/QueryBuilderGetQueryDynamicReturnTypeExtension.php(146):                                                                           
 PHPStan\Type\Doctrine\QueryBuilder\QueryBuilderGetQueryDynamicReturnTypeExtension->getQueryType()                                                                                                                                   
 #11 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(3353): PHPStan\Type\Doctrine\QueryBuilder\QueryBuilderGetQueryDynamicReturnTypeExtension->getTypeFromMethodCall()       
 #12 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(1365): PHPStan\Analyser\MutatingScope->methodCallReturnType()                                                           
 #13 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(1371): PHPStan\Analyser\MutatingScope->PHPStan\Analyser\{closure}()                                                     
 #14 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(557): PHPStan\Analyser\MutatingScope->resolveType()                                                                     
 #15 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(1365): PHPStan\Analyser\MutatingScope->getType()                                                                        
 #16 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(1371): PHPStan\Analyser\MutatingScope->PHPStan\Analyser\{closure}()                                                     
 #17 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(557): PHPStan\Analyser\MutatingScope->resolveType()                                                                     
 #18 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(777): PHPStan\Analyser\MutatingScope->getType()                                                                         
 #19 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/MutatingScope.php(557): PHPStan\Analyser\MutatingScope->resolveType()                                                                     
 #20 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(1446): PHPStan\Analyser\MutatingScope->getType()                                                                    
 #21 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(557): PHPStan\Analyser\NodeScopeResolver->findEarlyTerminatingExpr()                                                
 #22 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(360): PHPStan\Analyser\NodeScopeResolver->processStmtNode()                                                         
 #23 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(521): PHPStan\Analyser\NodeScopeResolver->processStmtNodes()                                                        
 #24 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(360): PHPStan\Analyser\NodeScopeResolver->processStmtNode()                                                         
 #25 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(599): PHPStan\Analyser\NodeScopeResolver->processStmtNodes()                                                        
 #26 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(360): PHPStan\Analyser\NodeScopeResolver->processStmtNode()                                                         
 #27 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(571): PHPStan\Analyser\NodeScopeResolver->processStmtNodes()                                                        
 #28 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(327): PHPStan\Analyser\NodeScopeResolver->processStmtNode()                                                         
 #29 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/FileAnalyser.php(175): PHPStan\Analyser\NodeScopeResolver->processNodes()                                                                 
 #30 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Command/WorkerCommand.php(148): PHPStan\Analyser\FileAnalyser->analyseFile()                                                                       
 #31 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/evenement/evenement/src/Evenement/EventEmitterTrait.php(97): PHPStan\Command\WorkerCommand->PHPStan\Command\{closure}()                         
 #32 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/clue/ndjson-react/src/Decoder.php(110): _PHPStan_4dd92cd93\Evenement\EventEmitter->emit()                                                       
 #33 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/evenement/evenement/src/Evenement/EventEmitterTrait.php(97): _PHPStan_4dd92cd93\Clue\React\NDJson\Decoder->handleData()                         
 #34 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/react/stream/src/Util.php(62): _PHPStan_4dd92cd93\Evenement\EventEmitter->emit()                                                                
 #35 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/evenement/evenement/src/Evenement/EventEmitterTrait.php(97): _PHPStan_4dd92cd93\React\Stream\Util::_PHPStan_4dd92cd93\React\Stream\{closure}()  
 #36 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/react/stream/src/DuplexResourceStream.php(154): _PHPStan_4dd92cd93\Evenement\EventEmitter->emit()                                               
 #37 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/react/event-loop/src/StreamSelectLoop.php(201): _PHPStan_4dd92cd93\React\Stream\DuplexResourceStream->handleData()                              
 #38 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/react/event-loop/src/StreamSelectLoop.php(173): _PHPStan_4dd92cd93\React\EventLoop\StreamSelectLoop->waitForStreamActivity()                    
 #39 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/src/Command/WorkerCommand.php(108): _PHPStan_4dd92cd93\React\EventLoop\StreamSelectLoop->run()                                                         
 #40 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Command/Command.php(259): PHPStan\Command\WorkerCommand->execute()                                                              
 #41 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(870): _PHPStan_4dd92cd93\Symfony\Component\Console\Command\Command->run()                                       
 #42 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(261): _PHPStan_4dd92cd93\Symfony\Component\Console\Application->doRunCommand()                                  
 #43 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(157): _PHPStan_4dd92cd93\Symfony\Component\Console\Application->doRun()                                         
 #44 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/bin/phpstan(124): _PHPStan_4dd92cd93\Symfony\Component\Console\Application->run()                                                                      
 #45 phar:///path/to/project/vendor/phpstan/phpstan/phpstan.phar/bin/phpstan(125): _PHPStan_4dd92cd93\{closure}()                                                                                                       
 #46 /path/to/project/vendor/phpstan/phpstan/phpstan(7): require('phar:///home/me...')                                                                                                                                  
 #47 /path/to/project/vendor/bin/phpstan(115): include('/home/meh/proje...')                                                                                                                                            
 #48 {main}                                                                                                                                                                                                                          
 Child process error (exit code 1):

my dynamic query:

$qb = $this->em->createQueryBuilder()
    ->select('episode.id')
    ->from('VideoBundle:Episode', 'episode', 'episode.id')
    ->where('episode.segmentsComplete = false')
    ->andWhere('0 != SIZE(episode.segments)')
    ->andWhere(
        '0 < (SELECT COUNT(last_segment.id) FROM VideoBundle:Segment as last_segment
              WHERE last_segment.episode = episode.id AND last_segment.isLastSegment = true)'
    )
    ->andWhere(
        "0 = (SELECT COUNT(segment.id) FROM VideoBundle:Segment as segment
              WHERE segment.episode = episode.id AND segment.state != 'distributed')"
    )
;

class Episode
{
    /**
     * @var Collection<Segment>
     * @ORM\OneToMany(
     *      targetEntity="App\VideoBundle\Entity\Segment",
     *      mappedBy="episode",
     *      cascade={"persist", "remove"},
     *      orphanRemoval=true
     * )
     * @ORM\OrderBy({"position" = "ASC"})
     */
    private $segments;
}

class Segment
{
/**
     * @ORM\ManyToOne(
     *     targetEntity="App\VideoBundle\Entity\Episode",
     *     inversedBy="segments",
     *     cascade={"persist"}
     * )
     * @ORM\JoinColumn(name="episode_id", referencedColumnName="id", nullable=false)
     * @var Episode
     */
    private $episode;
}

Originally posted by @mvhirsch in #422 (comment)

[ondrejmirtes]

Please provide a more complete example. The entities do not contain all the data. I tried to reproduce your problem, but couldn't: 148fd32

The type inference currently returns "mixed" because the DQL is surely wrong, there are missing columns. Maybe if you add more columns to the entities, it's gonna crash with a fatal error. I'd be fine with a PR that shows the crash.

[mvhirsch]

I'll provide more details at the end of this week!

[mvhirsch]

Sorry for late reply.

I tried reproducing my issue in #429, but I can't.
After a bit trial-and-error I realized: the code doesn't need to indexBy (third argument on select()).

Probably the issue is a combination of using old doctrine related libs (I'm currently forced to use):

symfony composer info doctrine/*
doctrine/annotations                1.14.2  Docblock Annotations Parser
doctrine/cache                      1.13.0  PHP Doctrine Cache library is a popular cache implementation that supports many different drivers such as redis, memcache, apc, mongodb and others.
doctrine/collections                1.8.0   PHP Doctrine Collections library that adds additional functionality on top of PHP arrays.
doctrine/common                     2.13.3  PHP Doctrine Common project is a library that provides additional functionality that other Doctrine projects depend on such as better reflection support, persistence interfaces, proxies, ev...
doctrine/data-fixtures              1.5.4   Data Fixtures for all Doctrine Object Managers
doctrine/dbal                       2.13.9  Powerful PHP database abstraction layer (DBAL) with many features for database schema introspection and management.
doctrine/deprecations               v1.0.0  A small layer on top of trigger_error(E_USER_DEPRECATED) or PSR-3 logging with options to disable all deprecations or selectively for packages.
doctrine/doctrine-bundle            1.12.13 Symfony DoctrineBundle
doctrine/doctrine-cache-bundle      1.4.0   Symfony Bundle for Doctrine Cache
doctrine/doctrine-fixtures-bundle   3.4.2   Symfony DoctrineFixturesBundle
doctrine/doctrine-migrations-bundle v1.3.2  Symfony DoctrineMigrationsBundle
doctrine/event-manager              1.2.0   The Doctrine Event Manager is a simple PHP event system that was built to be used with the various Doctrine projects.
doctrine/inflector                  1.4.4   PHP Doctrine Inflector is a small library that can perform string manipulations with regard to upper/lowercase and singular/plural forms of words.
doctrine/instantiator               1.5.0   A small, lightweight utility to instantiate objects in PHP without invoking their constructors
doctrine/lexer                      1.2.3   PHP Doctrine Lexer parser library that can be used in Top-Down, Recursive Descent Parsers.
doctrine/migrations                 v1.8.1  Database Schema migrations using Doctrine DBAL
doctrine/orm                        2.7.5   Object-Relational-Mapper for PHP
doctrine/persistence                1.3.8   The Doctrine Persistence project is a set of shared interfaces and functionality that the different Doctrine object mappers share.
doctrine/reflection                 1.2.3   The Doctrine Reflection project is a simple library used by the various Doctrine projects which adds some additional functionality on top of the reflection functionality that comes with PHP...

I'm very sorry for stealing your time. I think this can be closed. Would you mind to remove the added files? Or should I?

[ondrejmirtes]

No problem, thanks.

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