Reference Tagged Services combined with Autoconfiguring Tags does not work

[kniziol]

Symfony version(s) affected: 4.3.11

Description
Reference Tagged Services combined with Autoconfiguring Tags does not work

How to reproduce

1. Create interface
2. Tag the interface under _instanceof - as described in Autoconfiguring Tags
3. Create a service and pass all !tagged services as its arguments - as described in Reference Tagged Services
4. Run bin/console cache:clear (or any other command)
5. You will see Cannot autowire service (…): argument "$handlers" of method "__construct()" is type-hinted "iterable", you should configure its value explicitly. exception

Is it a bug?

Workaround

1. Create a Compiler Pass class that implements CompilerPassInterface
2. Call findTaggedServiceIds() + addMethodCall() as described in How to Work with Compiler Passes

Is there another solution?

[xabbuh]

Symfony 4.3 doesn't receive bugfixes anymore. Do you still experience this using Symfony 4.4? And if so can you please create a small example application that allows to reproduce it?

[kniziol]

I have focused more on this problem. Problem does not appear in 4.3 and 4.4 (both versions verified).

There was mistake, related to configuration 🤦