Renderer: Make `dispose()` more robust. (#31681)

src/renderers/common/Renderer.js

@@ -2171,25 +2171,29 @@ class Renderer {
 	 */
 	dispose() {
 
-		this.info.dispose();
-		this.backend.dispose();
+		if ( this._initialized === true ) {
 
-		this._animation.dispose();
-		this._objects.dispose();
-		this._pipelines.dispose();
-		this._nodes.dispose();
-		this._bindings.dispose();
-		this._renderLists.dispose();
-		this._renderContexts.dispose();
-		this._textures.dispose();
+			this.info.dispose();
+			this.backend.dispose();
 
-		if ( this._frameBufferTarget !== null ) this._frameBufferTarget.dispose();
+			this._animation.dispose();
+			this._objects.dispose();
+			this._pipelines.dispose();
+			this._nodes.dispose();
+			this._bindings.dispose();
+			this._renderLists.dispose();
+			this._renderContexts.dispose();
+			this._textures.dispose();
 
-		Object.values( this.backend.timestampQueryPool ).forEach( queryPool => {
+			if ( this._frameBufferTarget !== null ) this._frameBufferTarget.dispose();
 
-			if ( queryPool !== null ) queryPool.dispose();
+			Object.values( this.backend.timestampQueryPool ).forEach( queryPool => {
 
-		} );
+				if ( queryPool !== null ) queryPool.dispose();
+
+			} );
+
+		}
 
 		this.setRenderTarget( null );
 		this.setAnimationLoop( null );