Symfony version(s) affected: since 3.4.27

Description

If using a ServiceLocator with ids that looks like integers, given offset is ignored.

How to reproduce

service:
    my_service_locator:
        class: Symfony\Component\DependencyInjection\ServiceLocator
        public: false
        tags: ['container.service_locator']
        arguments:
            -
                '16': '@my_service1'
                '32': '@my_service2'

In my usecase, I want a different service based on a computation over data. (a string length). It was working fine with version 3.4.27 but doing the upgrade, system is now broken without changing the dependency injection configuration

Possible Solution

Issue occurs since 7146b95#diff-af68f8fbd009fd8de36403795ea0cf0aR52

Additional context