Fix exception when disposing sim sequencers (#9919)

microsoft · Mar 18, 2024 · 86a050d · 86a050d
1 parent 526c75a
commit 86a050d
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/pxtsim/sound/sequencer.ts b/pxtsim/sound/sequencer.ts
@@ -41,6 +41,7 @@ namespace pxsim.music {
 
         dispose() {
             if (this.metronome) this.metronome.dispose();
+            this.metronome = undefined
             this.stop();
             this.currentlyPlaying = undefined;
             this.listeners = {};
@@ -88,7 +89,7 @@ namespace pxsim.music {
         stop(sustainCurrentSounds = false) {
             if (this._state === "stop") return;
             this._state = "stop";
-            this.metronome.stop();
+            if (this.metronome) this.metronome.stop();
             this.fireStateChange();
 
             if (!sustainCurrentSounds) this.currentCancelToken.cancelled = true;