Dispose logger on extension deactivation

editors/code/src/main.ts

@@ -49,6 +49,8 @@ async function tryActivate(context: vscode.ExtensionContext) {
     );
     context.subscriptions.push(defaultOnEnter);
 
+    context.subscriptions.push(log);
+
     const config = new Config(context);
     const state = new PersistentState(context.globalState);
     const serverPath = await bootstrap(config, state).catch(err => {

editors/code/src/util.ts

@@ -18,6 +18,10 @@ export const log = new class {
     private enabled = true;
     private readonly output = vscode.window.createOutputChannel("Rust Analyzer Client");
 
+    dispose() {
+        log.output.dispose();
+    }
+
     setEnabled(yes: boolean): void {
         log.enabled = yes;
     }