**Symfony version(s) affected**: 4.4.0, 5.0.0 **Description** <!-- A clear and concise description of the problem. --> **How to reproduce** 1. Create a new project: ```sh composer create-project symfony/skeleton lint_bug ``` 2. Add config line to config/packages/framework.yaml ```yaml ide: phpstorm ``` 3. run command (`bin/console lint:container`) Expected outcome: Command completes successfully with no output. Actual outcome: <img width="1311" alt="lint_output" src="https://user-images.githubusercontent.com/97280/69437639-9ad36c00-0d3b-11ea-85c4-b26df63a938b.png"> **Possible Solution** Not yet (but will provide info/ PR if I get a clear idea!) However, this is to do with the parameter value containing a raw `%` character, which is then processed as if there is an embedded parameter within the value.