Issue #3402173 by sijumpk, Abhijith S, longwave, smustgrave: Remove...

Issue #3402173 by sijumpk, Abhijith S, longwave, smustgrave: Remove @backtrace_string in ExceptionLoggingSubscriber::onClientError()

(cherry picked from commit d3496f63)

core/lib/Drupal/Core/EventSubscriber/ExceptionLoggingSubscriber.php

@@ -87,6 +87,7 @@ public function onClientError(ExceptionEvent $event) {
     $error += [
       'status_code' => $exception->getStatusCode(),
     ];
+    unset($error['@backtrace_string']);
     $this->logger->get('client error')
       ->warning(Error::DEFAULT_ERROR_MESSAGE, $error);
   }

core/tests/Drupal/KernelTests/Core/EventSubscriber/ExceptionLoggingSubscriberTest.php

@@ -79,6 +79,11 @@ public function testExceptionLogging() {
     foreach ($expected_channels as $key => $expected_channel) {
       $this->assertEquals($expected_channel, $logs[$key][2]['channel']);
       $this->assertEquals($expected_levels[$key], $logs[$key][0]);
+
+      // Verify that @backtrace_string is removed from client error.
+      if ($logs[$key][2]['channel'] === 'client error') {
+        $this->assertArrayNotHasKey('@backtrace_string', $logs[$key][2]);
+      }
     }
   }