Unable to close Sprint with closed parent issue and open sub-tasks

Problem Definition

It is possible to close a parent issue (set to done) with open sub-tasks. When a user attempts to close a Sprint with these issues, a generic error occurs:

Sprint cannot be completed as there are incomplete subtasks on the following issues:

Suggested Solution

If there is a closed parent issue with open sub-tasks, it should give the user the option to either move all sub-tasks to done, or re-open the parent issue.

Workaround

Re-open the parent issue or close the sub-tasks using Bulk Change operations