Symfony version(s) affected

6.2.0

Description

The inner collection in the following code snippet is ignored:

<bind key="$foo" type="collection">
    <bind key="inner-collection" type="collection">
       <argument>item-1</argument>
       <argument>item-2</argument>
    </bind>
</bind>

How to reproduce

Bind a variable $foo with the following code snippet in a container configuration file, and try to dump this variable in a controller, the inner collection will be empty:

<bind key="$foo" type="collection">
    <bind key="inner-collection" type="collection">
       <argument>item-1</argument>
       <argument>item-2</argument>
    </bind>
</bind>

Possible Solution

Change Symfony\Component\DependencyInjection\Loader\XmlFileLoader as follows:

                 case 'collection': 
-                    $arguments[$key] = $this->getArgumentsAsPhp($arg, $name, $file);
+                    $argumentName = 'bind' === $arg->parentNode->nodeName ? 'argument' : $name;
+                    $arguments[$key] = $this->getArgumentsAsPhp($arg, $argumentName, $file);

Additional Context

No response