Handle errors thrown by reportError in queueMicrotask

src/workerd/api/global-scope.c++

@@ -706,7 +706,20 @@ void ServiceWorkerGlobalScope::queueMicrotask(jsg::Lock& js, v8::Local<v8::Funct
               return jsg::check(
                   function->Call(js.v8Context(), js.v8Null(), argv.size(), argv.data()));
             }, [&](jsg::Value exception) {
-              reportError(js, jsg::JsValue(exception.getHandle(js)));
+              // The reportError call itself can potentially throw errors. Let's catch
+              // and report them as well.
+              js.tryCatch([&] { reportError(js, jsg::JsValue(exception.getHandle(js))); },
+                  [&](jsg::Value exception) {
+                if (IoContext::hasCurrent()) {
+                // If we're running in a request context then we want to abort the
+                // request with the exception here.
+                IoContext::current().abort(js.exceptionToKj(kj::mv(exception)));
+                } else {
+                // If we're running outside of a request context. There's nothing to
+                // abort but we at least want to log the exception.
+                js.reportError(jsg::JsValue(exception.getHandle(js)));
+                }
+              });
               return js.v8Undefined();
             });
           }));