Catch all exceptions thrown while sending an event

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fix handling of fifth argument in the error handler (#892)
+- Catch exception from vendors in `Sentry\Transport\HttpTransport` (#899)
 
 ## 2.2.1 (2019-09-23)
 

Makefile

@@ -15,7 +15,7 @@ cs-dry-run:
 	vendor/bin/php-cs-fixer fix --config=.php_cs --verbose --diff --dry-run
 
 cs-fix:
-	vendor/bin/php-cs-fixer fix --config=.php_cs
+	vendor/bin/php-cs-fixer fix --config=.php_cs.dist
 
 phpstan:
 	vendor/bin/phpstan analyse

src/Transport/HttpTransport.php

@@ -4,6 +4,7 @@
 
 namespace Sentry\Transport;
 
+use Http\Client\Common\Exception\ClientErrorException;
 use Http\Client\HttpAsyncClient as HttpAsyncClientInterface;
 use Http\Message\RequestFactory as RequestFactoryInterface;
 use Http\Promise\Promise as PromiseInterface;
@@ -106,7 +107,11 @@ public function send(Event $event): ?string
         if ($this->delaySendingUntilShutdown) {
             $this->pendingRequests[] = $promise;
         } else {
-            $promise->wait(false);
+            try {
+                $promise->wait(false);
+            } catch (ClientErrorException $e) {
+                return null;
+            }
         }
 
         return $event->getId();
@@ -119,7 +124,10 @@ public function send(Event $event): ?string
     private function cleanupPendingRequests(): void
     {
         while ($promise = array_pop($this->pendingRequests)) {
-            $promise->wait(false);
+            try {
+                $promise->wait(false);
+            } catch (ClientErrorException $e) {
+            }
         }
     }
 }