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Array provided to ComposerJsonAndInstalledJsonSourceLocatorMaker::prefixPaths() #14724

Closed
phpstan/phpstan-src
#5779
Closed
Array provided to ComposerJsonAndInstalledJsonSourceLocatorMaker::prefixPaths()#14724
phpstan/phpstan-src
#5779

Description

@trowski
trowski
opened on May 28, 2026

Bug report

Hello!

I'm getting the following exception running 2.2.1 against a large codebase.

-- --------------------------------------------------------------------------- 
     Error                                                                      
 -- --------------------------------------------------------------------------- 
     Internal error:                                                            
     PHPStan\Reflection\BetterReflection\SourceLocator\ComposerJsonAndInstalle  
     dJsonSourceLocatorMaker::{closure:PHPStan\Reflection\BetterReflection\Sou  
     rceLocator\ComposerJsonAndInstalledJsonSourceLocatorMaker::prefixPaths():  
     193}(): Argument #1 ($path) must be of type string, array given while      
     analysing file                                                             
     {redacted}.php                                                                      
     Post the following stack trace to                                          
     https://github.com/phpstan/phpstan/issues/new?template=Bug_report.yaml:    
     ##                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/SourceLocator/ComposerJsonAndInstalledJsonSourceL  
     ocatorMaker.php(193)                                                       
     #0 [internal function]:                                                    
     PHPStan\Reflection\BetterReflection\SourceLocator\ComposerJsonAndInstalle  
     dJsonSourceLocatorMaker::{closure:PHPStan\Reflection\BetterReflection\Sou  
     rceLocator\ComposerJsonAndInstalledJsonSourceLocatorMaker::prefixPaths():  
     193}(Array)                                                                
     #1                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/SourceLocator/ComposerJsonAndInstalledJsonSourceL  
     ocatorMaker.php(193): array_map(Object(Closure), Array)                    
     #2                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/SourceLocator/ComposerJsonAndInstalledJsonSourceL  
     ocatorMaker.php(63):                                                       
     PHPStan\Reflection\BetterReflection\SourceLocator\ComposerJsonAndInstalle  
     dJsonSourceLocatorMaker->prefixPaths(Array, '/{redacted}...')          
     #3                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/BetterReflectionSourceLocatorFactory.php(162):     
     PHPStan\Reflection\BetterReflection\SourceLocator\ComposerJsonAndInstalle  
     dJsonSourceLocatorMaker->create('/{redacted}...')                      
     #4                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/SourceLocator/LazySourceLocator.php(26):           
     PHPStan\Reflection\BetterReflection\BetterReflectionSourceLocatorFactory-  
     >{closure:PHPStan\Reflection\BetterReflection\BetterReflectionSourceLoca   
     torFactory::create():131}()                                                
     #5                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/SourceLocator/LazySourceLocator.php(31):           
     PHPStan\Reflection\BetterReflection\SourceLocator\LazySourceLocator->laz   
     yInitialize()                                                              
     #6                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/o  
     ndrejmirtes/better-reflection/src/SourceLocator/Type/MemoizingSourceLocat  
     or.php(30):                                                                
     PHPStan\Reflection\BetterReflection\SourceLocator\LazySourceLocator->loc   
     ateIdentifier(Object(PHPStan\BetterReflection\Reflector\DefaultReflector)  
     , Object(PHPStan\BetterReflection\Identifier\Identifier))                  
     #7                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/o  
     ndrejmirtes/better-reflection/src/Reflector/DefaultReflector.php(29):      
     PHPStan\BetterReflection\SourceLocator\Type\MemoizingSourceLocator->loca   
     teIdentifier(Object(PHPStan\BetterReflection\Reflector\DefaultReflector),  
     Object(PHPStan\BetterReflection\Identifier\Identifier))                    
     #8                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/Reflector/MemoizingReflector.php(50):              
     PHPStan\BetterReflection\Reflector\DefaultReflector->reflectClass('{reda
	 cted}...')                                                          
     #9                                                                         
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/BetterReflection/BetterReflectionProvider.php(145):                 
     PHPStan\Reflection\BetterReflection\Reflector\MemoizingReflector->reflec   
     tClass('{redacted}...')                                             
     #10                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Refl  
     ection/ReflectionProvider/MemoizingReflectionProvider.php(37):             
     PHPStan\Reflection\BetterReflection\BetterReflectionProvider->hasClass('   
     {redacted}...')                                                     
     #11                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Rule  
     s/ClassCaseSensitivityCheck.php(35):                                       
     PHPStan\Reflection\ReflectionProvider\MemoizingReflectionProvider->hasCl   
     ass('{redacted}...')                                                
     #12                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Rule  
     s/ClassNameCheck.php(35):                                                  
     PHPStan\Rules\ClassCaseSensitivityCheck->checkClassNames(Array)            
     #13                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Rule  
     s/Namespaces/ExistingNamesInUseRule.php(116):                              
     PHPStan\Rules\ClassNameCheck->checkClassNames(Object(PHPStan\Analyser\Fi   
     ber\FiberScope), Array, NULL)                                              
     #14                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Rule  
     s/Namespaces/ExistingNamesInUseRule.php(64):                               
     PHPStan\Rules\Namespaces\ExistingNamesInUseRule->checkClasses(Object(PHP   
     Stan\Analyser\Fiber\FiberScope), Array)                                    
     #15                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/FileAnalyserCallback.php(134):                                        
     PHPStan\Rules\Namespaces\ExistingNamesInUseRule->processNode(Object(PhpP   
     arser\Node\Stmt\Use_), Object(PHPStan\Analyser\Fiber\FiberScope))          
     #16                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/Fiber/FiberNodeScopeResolver.php(37):                                 
     PHPStan\Analyser\FileAnalyserCallback->__invoke(Object(PhpParser\Node\St   
     mt\Use_), Object(PHPStan\Analyser\Fiber\FiberScope))                       
     #17 [internal function]:                                                   
     PHPStan\Analyser\Fiber\FiberNodeScopeResolver::{closure:PHPStan\Analyser\  
     Fiber\FiberNodeScopeResolver::callNodeCallback():34}()                     
     #18                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/Fiber/FiberNodeScopeResolver.php(41): Fiber->start()                  
     #19                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/NodeScopeResolver.php(641):                                           
     PHPStan\Analyser\Fiber\FiberNodeScopeResolver->callNodeCallback(Object(P   
     HPStan\Analyser\FileAnalyserCallback), Object(PhpParser\Node\Stmt\Use_),   
     Object(PHPStan\Analyser\MutatingScope),                                    
     Object(PHPStan\Analyser\ExpressionResultStorage))                          
     #20                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/NodeScopeResolver.php(410):                                           
     PHPStan\Analyser\NodeScopeResolver->processStmtNode(Object(PhpParser\Nod   
     e\Stmt\Use_), Object(PHPStan\Analyser\MutatingScope),                      
     Object(PHPStan\Analyser\ExpressionResultStorage),                          
     Object(PHPStan\Analyser\FileAnalyserCallback),                             
     Object(PHPStan\Analyser\StatementContext))                                 
     #21                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Anal  
     yser/FileAnalyser.php(108):                                                
     PHPStan\Analyser\NodeScopeResolver->processNodes(Array,                    
     Object(PHPStan\Analyser\MutatingScope),                                    
     Object(PHPStan\Analyser\FileAnalyserCallback))                             
     #22                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Para  
     llel/WorkerRunner.php(129):                                                
     PHPStan\Analyser\FileAnalyser->analyseFile('/{redacted}...', Array,    
     Object(PHPStan\Rules\LazyRegistry), Object(PHPStan\Collectors\Registry),   
     NULL)                                                                      
     #23                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/e  
     venement/evenement/src/EventEmitterTrait.php(111):                         
     PHPStan\Parallel\WorkerRunner::{closure:PHPStan\Parallel\WorkerRunner::ru  
     nWorker():105}(Array)                                                      
     #24                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/c  
     lue/ndjson-react/src/Decoder.php(117):                                     
     _PHPStan_f1a311097\Evenement\EventEmitter->emit('data', Array)             
     #25                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/e  
     venement/evenement/src/EventEmitterTrait.php(111):                         
     _PHPStan_f1a311097\Clue\React\NDJson\Decoder->handleData(Array)            
     #26                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/r  
     eact/stream/src/Util.php(62):                                              
     _PHPStan_f1a311097\Evenement\EventEmitter->emit('data', Array)             
     #27                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/e  
     venement/evenement/src/EventEmitterTrait.php(111):                         
     _PHPStan_f1a311097\React\Stream\Util::{closure:_PHPStan_f1a311097\React\S  
     tream\Util::forwardEvents():61}('{"action":"anal...')                      
     #28                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/r  
     eact/stream/src/DuplexResourceStream.php(168):                             
     _PHPStan_f1a311097\Evenement\EventEmitter->emit('data', Array)             
     #29                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/r  
     eact/event-loop/src/StreamSelectLoop.php(201):                             
     _PHPStan_f1a311097\React\Stream\DuplexResourceStream->handleData(Resourc   
     e id #8070)                                                                
     #30                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/r  
     eact/event-loop/src/StreamSelectLoop.php(173):                             
     _PHPStan_f1a311097\React\EventLoop\StreamSelectLoop->waitForStreamActivi   
     ty(NULL)                                                                   
     #31                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Para  
     llel/WorkerRunner.php(87):                                                 
     _PHPStan_f1a311097\React\EventLoop\StreamSelectLoop->run()                 
     #32                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/src/Comm  
     and/WorkerCommand.php(72):                                                 
     PHPStan\Parallel\WorkerRunner->run(Object(_PHPStan_f1a311097\Symfony\Com   
     ponent\Console\Output\ConsoleOutput), Array, 44453, '2pmyvg66cd', NULL,    
     NULL)                                                                      
     #33                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/s  
     ymfony/console/Command/Command.php(259):                                   
     PHPStan\Command\WorkerCommand->execute(Object(_PHPStan_f1a311097\Symfony   
     \Component\Console\Input\ArgvInput),                                       
     Object(_PHPStan_f1a311097\Symfony\Component\Console\Output\ConsoleOutput)  
     )                                                                          
     #34                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/s  
     ymfony/console/Application.php(868):                                       
     _PHPStan_f1a311097\Symfony\Component\Console\Command\Command->run(Object   
     (_PHPStan_f1a311097\Symfony\Component\Console\Input\ArgvInput),            
     Object(_PHPStan_f1a311097\Symfony\Component\Console\Output\ConsoleOutput)  
     )                                                                          
     #35                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/s  
     ymfony/console/Application.php(261):                                       
     _PHPStan_f1a311097\Symfony\Component\Console\Application->doRunCommand(O   
     bject(PHPStan\Command\WorkerCommand),                                      
     Object(_PHPStan_f1a311097\Symfony\Component\Console\Input\ArgvInput),      
     Object(_PHPStan_f1a311097\Symfony\Component\Console\Output\ConsoleOutput)  
     )                                                                          
     #36                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/vendor/s  
     ymfony/console/Application.php(157):                                       
     _PHPStan_f1a311097\Symfony\Component\Console\Application->doRun(Object(_   
     PHPStan_f1a311097\Symfony\Component\Console\Input\ArgvInput),              
     Object(_PHPStan_f1a311097\Symfony\Component\Console\Output\ConsoleOutput)  
     )                                                                          
     #37                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/bin/phps  
     tan(106):                                                                  
     _PHPStan_f1a311097\Symfony\Component\Console\Application->run()            
     #38                                                                        
     phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar/bin/phps  
     tan(107):                                                                  
     {closure:phar:///{redacted}/vendor/phpstan/phpstan/phpstan.phar  
     /bin/phpstan:16}()                                                         
     #39 /{redacted}/vendor/phpstan/phpstan/phpstan(8):               
     require('phar:///{redacted}...')                                              
     #40 /{redacted}/vendor/bin/phpstan(119):                         
     include('/{redacted}...')                                              
     #41 {main}                                                                 
 -- ---------------------------------------------------------------------------

Code snippet that reproduces the problem

No response

Expected output

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