Github user robertdale commented on the issue:
https://github.com/apache/tinkerpop/pull/907
@RainMark Could you create an issue in Jira and describe the problem? See
also [Contributing code
changes](https://tinkerpop.apache.org/docs/current/dev/developer/#_contributing_code_changes).
It would be good to see a test case that fails without the change and passes
with the change but also satisfies the examples in the documentation.
I also want to make sure you're not running into this
- http://tinkerpop.apache.org/docs/current/reference/#sack-step
```
The first example does not use a split operator and as such, the same map
is propagated to
all traversers (a global data structure). The second example, demonstrates
how Map.clone()
ensures that each traverserâs sack contains a unique, local sack.
```
---