message: Fix length (the linter really should have caught this one)
diff: @@ -331,7 +331,7 @@ export default class Combined implements DiskStore {
  l.debug(() => ['readValue', debug({ key, keyAt, keyValue })]);
  const { valueAt, valueLength } = this._extractValueInfo(keyValue);
  - const value = Buffer.alloc(length);
  + const value = Buffer.alloc(valueLength);
  fs.readSync(this._fd, value, 0, valueLength, valueAt);
  