refs #4550 Promise.all() catch fix

print-server.js

@@ -124,8 +124,13 @@ class PrintServer {
                     jobs = [];
                     for (let i = 0; i < conf.concurrency; i++) {
                         const jobId = await this.getJob();
-                        if (jobId)
+                        if (jobId) {
-                            jobs.push(this.printJob(jobId));
+                            const job = this.printJob(jobId);
+                            // XXX: Workaround for Promise.all() unhandledRejection
+                            // https://stackoverflow.com/questions/67789309/why-do-i-get-an-unhandled-promise-rejection-with-await-promise-all
+                            job.catch(() => {});
+                            jobs.push(job);
+                        }
                         else
                             break;
                     }