bug symfony#48502 [DependencyInjection] Fix ContainerBuilder stats env usage with enum (alamirault)

This PR was squashed before being merged into the 6.2 branch.

Discussion
----------

[DependencyInjection] Fix `ContainerBuilder` stats env usage with enum

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix symfony#48498 <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Without patch:

```php
[
    'enum:Symfony\Component\DependencyInjection\Tests\Fixtures\StringBackedEnum:foo' => 0,
    'Bar' => 1,
]
```

With patch:

```php
[
    'enum:Symfony\Component\DependencyInjection\Tests\Fixtures\StringBackedEnum:foo' => 1,
    'Bar' => 1,
]
```

Commits
-------

75da869 [DependencyInjection] Fix `ContainerBuilder` stats env usage with enum

Author: nicolas-grekas

src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php

@@ -49,7 +49,7 @@ public function get(string $name): array|bool|string|int|float|\UnitEnum|null
             }
 
             $uniqueName = md5($name.'_'.self::$counter++);
-            $placeholder = sprintf('%s_%s_%s', $this->getEnvPlaceholderUniquePrefix(), strtr($env, ':-.', '___'), $uniqueName);
+            $placeholder = sprintf('%s_%s_%s', $this->getEnvPlaceholderUniquePrefix(), strtr($env, ':-.\\', '____'), $uniqueName);
             $this->envPlaceholders[$env][$placeholder] = $placeholder;
 
             return $placeholder;

src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php

@@ -51,6 +51,7 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\FooWithAbstractArgument;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\ScalarFactory;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\SimilarArgumentsDummy;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\StringBackedEnum;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\WitherStaticReturnType;
 use Symfony\Component\DependencyInjection\TypedReference;
 use Symfony\Component\ExpressionLanguage\Expression;
@@ -545,6 +546,23 @@ public function testEnvExpressionFunction()
         $this->assertEquals('Foo value', $container->get('bar')->foo);
     }
 
+    public function testGetEnvCountersWithEnum()
+    {
+        $bag = new EnvPlaceholderParameterBag();
+        $config = new ContainerBuilder($bag);
+        $config->resolveEnvPlaceholders([
+            $bag->get('env(enum:'.StringBackedEnum::class.':foo)'),
+            $bag->get('env(Bar)'),
+        ]);
+
+        $expected = [
+            'enum:Symfony\Component\DependencyInjection\Tests\Fixtures\StringBackedEnum:foo' => 1,
+            'Bar' => 1,
+        ];
+
+        $this->assertSame($expected, $config->getEnvCounters());
+    }
+
     public function testCreateServiceWithAbstractArgument()
     {
         $this->expectException(RuntimeException::class);