Clear bitmap timeout on dispose

src/renderer/BaseRenderLayer.ts

@@ -51,6 +51,7 @@ export abstract class BaseRenderLayer implements IRenderLayer {
 
   public dispose(): void {
     this._container.removeChild(this._canvas);
+    this._charAtlas.dispose();
   }
 
   private _initCanvas(): void {

src/renderer/atlas/BaseCharAtlas.ts

@@ -4,10 +4,13 @@
  */
 
 import { IGlyphIdentifier } from './Types';
+import { IDisposable } from 'xterm';
 
-export default abstract class BaseCharAtlas {
+export default abstract class BaseCharAtlas implements IDisposable {
   private _didWarmUp: boolean = false;
 
+  public dispose(): void { }
+
   /**
    * Perform any work needed to warm the cache before it can be used. May be called multiple times.
    * Implement _doWarmUp instead if you only want to get called once.

src/renderer/atlas/DynamicCharAtlas.ts

@@ -120,6 +120,13 @@ export default class DynamicCharAtlas extends BaseCharAtlas {
     // document.body.appendChild(this._cacheCanvas);
   }
 
+  public dispose(): void {
+    if (this._bitmapCommitTimeout !== null) {
+      window.clearTimeout(this._bitmapCommitTimeout);
+      this._bitmapCommitTimeout = null;
+    }
+  }
+
   public beginFrame(): void {
     this._drawToCacheCount = 0;
   }