bug #35672 [HttpClient] fix HttpClientDataCollector when handling can…

…celed responses (thematchless)

This PR was merged into the 4.4 branch.

Discussion
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[HttpClient] fix HttpClientDataCollector when handling canceled responses

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

small addition to the already merged #35562

Commits
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7088ef7 [HttpClient] fix HttpClientDataCollector when handling canceled responses

src/Symfony/Component/HttpClient/DataCollector/HttpClientDataCollector.php

@@ -120,7 +120,7 @@ private function collectOnClient(TraceableHttpClient $client): array
                 unset($info['http_method']);
             }
 
-            if ($trace['url'] === $info['url']) {
+            if (($info['url'] ?? null) === $trace['url']) {
                 unset($info['url']);
             }