bug #33532 [HttpKernel] fix compat with legacy DebugClassLoader (nicolas-grekas)

This PR was merged into the 4.4 branch.

Discussion
----------

[HttpKernel] fix compat with legacy DebugClassLoader

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

73198c6d51 [HttpKernel] fix compat with legacy DebugClassLoader

src/Symfony/Component/HttpKernel/DependencyInjection/AddAnnotatedClassesToCachePass.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\HttpKernel\DependencyInjection;
 
 use Composer\Autoload\ClassLoader;
+use Symfony\Component\Debug\DebugClassLoader as LegacyDebugClassLoader;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\ErrorHandler\DebugClassLoader;
@@ -90,7 +91,7 @@ class AddAnnotatedClassesToCachePass implements CompilerPassInterface
                 continue;
             }
 
-            if ($function[0] instanceof DebugClassLoader) {
+            if ($function[0] instanceof DebugClassLoader || $function[0] instanceof LegacyDebugClassLoader) {
                 $function = $function[0]->getClassLoader();
             }
 

src/Symfony/Component/HttpKernel/Kernel.php

@@ -16,6 +16,7 @@ use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper;
 use Symfony\Component\Config\ConfigCache;
 use Symfony\Component\Config\Loader\DelegatingLoader;
 use Symfony\Component\Config\Loader\LoaderResolver;
+use Symfony\Component\Debug\DebugClassLoader as LegacyDebugClassLoader;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -544,7 +545,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
                 }
                 // Remove frames added by DebugClassLoader.
                 for ($i = \count($backtrace) - 2; 0 < $i; --$i) {
-                    if (DebugClassLoader::class === ($backtrace[$i]['class'] ?? null)) {
+                    if (\in_array($backtrace[$i]['class'] ?? null, [DebugClassLoader::class, LegacyDebugClassLoader::class], true)) {
                         $backtrace = [$backtrace[$i + 1]];
                         break;
                     }