minor #32511 [Debug][DebugClassLoader] Don't check class if the inclu…

…ded file doesn't exist (fancyweb)

This PR was merged into the 3.4 branch.

Discussion
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[Debug][DebugClassLoader] Don't check class if the included file doesn't exist

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Follow up to #32500.

If the included file doesn't exist, we need to return or the execution continues (if warnings are not thrown as exceptions) and then an invalid exception is thrown when the class is checked.

For example : "The autoloader expected class "App\Foo\Bar" to be defined in file "/var/www/html/vendor/composer/../../src/Foo/Bar.php". The file was found but the class was not in it, the class name or namespace probably has a typo".

Commits
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0185527 [Debug][DebugClassLoader] Don't check class if the included file don't exist

src/Symfony/Component/Debug/DebugClassLoader.php

@@ -152,8 +152,8 @@ public function loadClass($class)
                     include $file;
 
                     return;
-                } else {
-                    include $file;
+                } elseif (false === include $file) {
+                    return;
                 }
             } else {
                 \call_user_func($this->classLoader, $class);