Bug report

Code snippet that reproduces the problem

<?php declare(strict_types = 1);

str_repeat('abcdefghij', 1_000_000_000);

(can't share a link with this snippet on phpstan.org, it errors with An error occured. Please try again later.)

Expected output

No output expected. Got this instead:

Child process error (exit code 255): Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate  
10000000032 bytes) in phar:///var/www/bin/phpstan/src/Type/Php/StrRepeatFunctionReturnTypeExtension.php on line 42      
                                                                                                                        
PHPStan process crashed because it reached configured PHP memory limit: 4096M                                           
Increase your memory limit in php.ini or run PHPStan with --memory-limit CLI option. 

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