src/.preload.php: Notice: Uninitialized string offset: 0

[pawellen]

Symfony creates src/.preload.php file. Parsing this file in vendor/ongr/elasticsearch-bundle/DependencyInjection/Compiler/MappingPass.php causes error because .preload.php doeas not include namespace:

Notice: Uninitialized string offset: 0

[maluramichael]

I had to delete the file. Is it needed?