message: stress test: check if disposed before calling set
diff: @@ -296,12 +296,15 @@ export class LoadTestDataStoreModel {
  * Upload a unique attachment blob and store the handle in a unique key on the root map
  */
  public async writeBlob(blobNumber: number) {
  - if (!this.runtime.disposed) {
  + if (this.runtime.disposed) {
  + return;
  + }
  const blobSize = this.config.testConfig.blobSize ?? defaultBlobSize;
  // upload a unique blob, since they may be deduped otherwise
  const buffer = Buffer.alloc(blobSize, `${this.config.runId}/${blobNumber}:`);
  assert(buffer.byteLength === blobSize, "incorrect buffer size");
  const handle = await this.runtime.uploadBlob(buffer);
  + if (!this.runtime.disposed) {
  this.root.set(this.blobKey(blobNumber), handle);
  }
  }
  