cannot reassign const

bouncer/shared/utils/substrate.ts

@@ -21,6 +21,9 @@ const getCachedDisposable = <T extends AsyncDisposable, F extends (...args: any[
     let disposablePromise = cache.get(cacheKey);
 
     if (!disposablePromise) {
+      // we can't call await here because if this function is called multiple times
+      // before the promise resolves, we would create multiple instances of the same
+      // disposable. Instead, we cache the promise and return it immediately.
       disposablePromise = factory(...args);
       cache.set(cacheKey, disposablePromise);
       console.log('creating disposable', name, cacheKey);
@@ -45,7 +48,7 @@ const getCachedDisposable = <T extends AsyncDisposable, F extends (...args: any[
                   ) as unknown as () => Promise<void>;
 
                   dispose.call(target).catch(() => null);
-                  disposable = undefined;
+                  cache.delete(cacheKey);
                 } catch (error) {
                   console.error('Failed to dispose', name, cacheKey, error);
                 }