Disable OpCache for PHP < 7.4.x, #4881

Author: rrazor

bin/phpstan

@@ -11,6 +11,11 @@ use Symfony\Component\Console\Helper\ProgressBar;
 (function () {
 	error_reporting(E_ALL);
 	ini_set('display_errors', 'stderr');
+    if (version_compare(PHP_VERSION, '7.4.0', '<')) {
+		// PHP earlier than 7.4.x with OpCache triggers a bug when we intercept
+		// custom autoloaders' reads to discover file paths. See PHPStan #4881.
+		ini_set('opcache.enable', 'Off');
+	}
 	gc_disable(); // performance boost
 
 	define('__PHPSTAN_RUNNING__', true);