LibWeb: Make factory methods of HTML::MessageEvent fallible

Author: https://github.com/kennethmyhra
Commit: 7ec444047c
Pull-request: https://github.com/SerenityOS/serenity/pull/17491
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/HTML/Worker.cpp

@@ -166,7 +166,7 @@ void Worker::run_a_worker(AK::URL& url, EnvironmentSettingsObject& outside_setti
                 MessageEventInit event_init {};
                 event_init.data = message;
                 event_init.origin = "<origin>";
-                dispatch_event(*MessageEvent::create(*m_worker_realm, HTML::EventNames::message, event_init));
+                dispatch_event(MessageEvent::create(*m_worker_realm, HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
             }));
 
             return JS::js_undefined();