Finish processing workers that exist after a failure

src/util/WorkerPool.js

@@ -98,7 +98,12 @@ class WorkerPool {
 
       // Return result in deferred task promise
       task.deferred.resolve(result);
-    }).catch(task.deferred.reject);
+    }).catch((err) => {
+      // Trigger task processing
+      this.processTasks();
+
+      task.deferred.reject(err);
+    });
   }
 }