closed_on field of copied issue is always set to source issue's value
|Assignee:||Jean-Philippe Lang||% Done:|
When we copy a closed issue, the value of "closed_on" of copied issue is always set to source issue's value, even if the status of copied issue is not closed. I think it should be nil because the copied issue have not been closed before.
Steps to reproduce:
1. Create a closed issue (Issue_A).
2. Click "Copy" on Issue_A.
3. Change status to "New" and create a new copied issue (Issue_B).
4. "closed_on" field of Issue_B should be nil, but the value is same with Issue_A.
closed_on field of copied issue is always set to source issue's value (#23764).
Patch by Go MAEDA.