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vendor/symfony/http-kernel/DataCollector/DataCollector.php

@@ -63,9 +63,21 @@ abstract class DataCollector implements DataCollectorInterface
         $casters = [
             '*' => function ($v, array $a, Stub $s, $isNested) {
                 if (!$v instanceof Stub) {
+                    $b = $a;
                     foreach ($a as $k => $v) {
-                        if (\is_object($v) && !$v instanceof \DateTimeInterface && !$v instanceof Stub) {
-                            $a[$k] = new CutStub($v);
+                        if (!\is_object($v) || $v instanceof \DateTimeInterface || $v instanceof Stub) {
+                            continue;
+                        }
+
+                        try {
+                            $a[$k] = $s = new CutStub($v);
+
+                            if ($b[$k] === $s) {
+                                // we've hit a non-typed reference
+                                $a[$k] = $v;
+                            }
+                        } catch (\TypeError $e) {
+                            // we've hit a typed reference
                         }
                     }
                 }