fix task running state

src/background/task.ts

@@ -111,7 +111,18 @@ export class Task {
             if (upstreamData) {
                 urls = parseUrls(upstreamData);
             } else {
-                urls = [await queryUrl(tab)];
+                let tabURL: string;
+                await queryUrl(tab)
+                    .then(u => {
+                        tabURL = u;
+                    })
+                    .catch(() => {
+                        e => {
+                            this._running = false;
+                            return Promise.reject(e);
+                        }
+                    });
+                urls = [tabURL];
             }
         }
         return urls.reduce((p, url, i) => p.then(
@@ -134,8 +145,8 @@ export class Task {
                 if (results && results.length) {
                     let lastURL = urls[urls.length - 1];
                     this.saveResult(results, lastURL);
-                    this._running = false;
                 }
+                this._running = false;
             }
         ).catch(
             e => {