Symfony version(s) affected

≥ 3.2

Description

When dumping a compiled container, env placeholders like env_f10f3d959fafc55a_FOO_9a1a890d5dc971890ff9dac294110492 don’t need to be quoted, but since resolveEnvPlaceholders is called on the resulting dump, those will be replaced without being quoted, thus making the Parser crash.

How to reproduce

$container = new ContainerBuilder();
$container->setParameter('foo', '%env(FOO)%');
$container->compile();

(new Parser())->parse((new YamlDumper($container))->dump()));

Symfony\Component\Yaml\Exception\ParseException: The reserved indicator "%" cannot start a plain scalar; you need to quote the scalar at line 2 (near "foo: %env(FOO)%").

Possible Solution

resolveEnvPlaceholders should be called for each string able to contain such placeholders rather than the entire dump.

Additional Context

No response