symfony
diff --git a/‎src/Symfony/Component/Messenger/Stamp/ErrorDetailsStamp.php
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+2-2Lines changed: 2 additions & 2 deletions b/‎src/Symfony/Component/Messenger/Stamp/ErrorDetailsStamp.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Messenger/Stamp/ErrorDetailsStamp.php
+2-2Lines changed: 2 additions & 2 deletions
diff --git a/‎src/Symfony/Component/Messenger/Tests/Stamp/ErrorDetailsStampTest.php
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+24Lines changed: 24 additions & 0 deletions b/‎src/Symfony/Component/Messenger/Tests/Stamp/ErrorDetailsStampTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Messenger/Tests/Stamp/ErrorDetailsStampTest.php
+24Lines changed: 24 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Messenger/Tests/Stamp/StringErrorCodeException.php
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+12Lines changed: 12 additions & 0 deletions b/‎src/Symfony/Component/Messenger/Tests/Stamp/StringErrorCodeException.php
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+12Lines changed: 12 additions & 0 deletions
@@ -23,7 +23,7 @@ final class ErrorDetailsStamp implements StampInterface
     /** @var string */
     private $exceptionClass;
 
-    /** @var int|mixed */
+    /** @var int|string */
     private $exceptionCode;
 
     /** @var string */
@@ -33,7 +33,7 @@ final class ErrorDetailsStamp implements StampInterface
     private $flattenException;
 
     /**
-     * @param int|mixed $exceptionCode
+     * @param int|string $exceptionCode
      */
     public function __construct(string $exceptionClass, $exceptionCode, string $exceptionMessage, FlattenException $flattenException = null)
     {
 
@@ -18,6 +18,8 @@
 use Symfony\Component\Messenger\Stamp\ErrorDetailsStamp;
 use Symfony\Component\Messenger\Transport\Serialization\Normalizer\FlattenExceptionNormalizer;
 use Symfony\Component\Messenger\Transport\Serialization\Serializer;
+use Symfony\Component\PropertyInfo\Extractor\ConstructorExtractor;
+use Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\Normalizer\ArrayDenormalizer;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
@@ -70,4 +72,26 @@ public function testDeserialization()
         $this->assertInstanceOf(ErrorDetailsStamp::class, $deserializedStamp);
         $this->assertEquals($stamp, $deserializedStamp);
     }
+
+    public function testDeserializationWithStringExceptionCode()
+    {
+        $exception = new StringErrorCodeException('exception message', 'some code');
+        $stamp = ErrorDetailsStamp::create($exception);
+        $extractor = new ConstructorExtractor([
+            new ReflectionExtractor(),
+        ]);
+        $serializer = new Serializer(
+            new SymfonySerializer([
+                new ArrayDenormalizer(),
+                new FlattenExceptionNormalizer(),
+                new ObjectNormalizer(null, null, null, $extractor, null, null, []),
+            ], [new JsonEncoder()])
+        );
+
+        $deserializedEnvelope = $serializer->decode($serializer->encode(new Envelope(new \stdClass(), [$stamp])));
+
+        $deserializedStamp = $deserializedEnvelope->last(ErrorDetailsStamp::class);
+        $this->assertInstanceOf(ErrorDetailsStamp::class, $deserializedStamp);
+        $this->assertEquals($stamp, $deserializedStamp);
+    }
 }
@@ -0,0 +1,12 @@
+<?php
+
+namespace Symfony\Component\Messenger\Tests\Stamp;
+
+class StringErrorCodeException extends \Exception
+{
+    public function __construct(string $message, string $code)
+    {
+        parent::__construct($message);
+        $this->code = $code;
+    }
+}