diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
index 5c7817e3c9afd..37b6510b947d6 100644
--- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php
+++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
@@ -56,8 +56,12 @@ public function setCallback(callable $callback): static
return $this;
}
- public function getCallback(): \Closure
+ public function getCallback(): ?\Closure
{
+ if (!isset($this->callback)) {
+ return null;
+ }
+
return ($this->callback)(...);
}
diff --git a/src/Symfony/Component/HttpKernel/HttpKernel.php b/src/Symfony/Component/HttpKernel/HttpKernel.php
index 4999870e4c55d..d2cf4eaee27ce 100644
--- a/src/Symfony/Component/HttpKernel/HttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/HttpKernel.php
@@ -92,8 +92,7 @@ public function handle(Request $request, int $type = HttpKernelInterface::MAIN_R
} finally {
$this->requestStack->pop();
- if ($response instanceof StreamedResponse) {
- $callback = $response->getCallback();
+ if ($response instanceof StreamedResponse && $callback = $response->getCallback()) {
$requestStack = $this->requestStack;
$response->setCallback(static function () use ($request, $callback, $requestStack) {
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