Fix typings in service.worker.runtime.graphql.middlewares.error

Only handle errors which are instances of ApolloError.

This particular error handler expects errors will come as extensions of ApolloError, otherwise the operations within the error handler wouldn't make any sense.

Author: arturpimentel

src/service/worker/runtime/graphql/middlewares/error.ts

@@ -1,4 +1,4 @@
-import { formatApolloErrors } from 'apollo-server-errors'
+import { ApolloError, formatApolloErrors } from 'apollo-server-errors'
 import { uniqBy } from 'ramda'
 
 import { LINKED } from '../../../../../constants'
@@ -74,6 +74,9 @@ export async function graphqlError (ctx: GraphQLServiceContext, next: () => Prom
     }
   }
   catch (e) {
+    if (!(e instanceof ApolloError)) {
+      throw e
+    }
     if (e.code === cancelledErrorCode) {
       ctx.status = cancelledRequestStatus
       return