fix: release running task after error so more tasks can run

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### 🐞 Bug fixes
 - Fix updating terrain tiles on feature state changes ([#6231](https://github.com/maplibre/maplibre-gl-js/issues/6231)) (by [pstaszek](https://github.com/pstaszek))
 - _...Add new stuff here..._
+- fix error during task execution blocking any further task execution ([#7031](https://github.com/maplibre/maplibre-gl-js/pull/7031))
 
 ## 5.17.0
 

src/util/task_queue.test.ts

@@ -112,4 +112,15 @@ describe('TaskQueue', () => {
         q.run();
         expect(after).not.toHaveBeenCalled();
     });
+
+    test('Resets _currentlyRunning when a task throws an error', () => {
+        const q = new TaskQueue();
+        q.add(() => { throw new Error('Task error'); });
+        expect(() => q.run()).toThrow('Task error');
+        // Should be able to run again - _currentlyRunning should be false
+        const afterError = vi.fn();
+        q.add(afterError);
+        q.run();
+        expect(afterError).toHaveBeenCalledTimes(1);
+    });
 });

src/util/task_queue.ts

@@ -45,14 +45,16 @@ export class TaskQueue {
         // on the next run, not the current run.
         this._queue = [];
 
-        for (const task of queue) {
-            if (task.cancelled) continue;
-            task.callback(timeStamp);
-            if (this._cleared) break;
+        try {
+            for (const task of queue) {
+                if (task.cancelled) continue;
+                task.callback(timeStamp);
+                if (this._cleared) break;
+            }
+        } finally {
+            this._cleared = false;
+            this._currentlyRunning = false;
         }
-
-        this._cleared = false;
-        this._currentlyRunning = false;
     }
 
     clear() {