diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php index ea2b73f874ba6..af03835b7f8a6 100644 --- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php +++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php @@ -26,7 +26,7 @@ */ class StreamedResponse extends Response { - protected \Closure $callback; + protected ?\Closure $callback = null; protected bool $streamed = false; private bool $headersSent = false;
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