Steps:

1. Log in to the back office
2. Go to Content/Content structure
3. Click Create, select article and confirm
4. For article create form: click Save and close
5. Go to Dashboard
6. Click the link to recently created draft

Alternative steps:

1. Create an article
2. Send it to trash
3. Go to Dashboard
4. Click link to the recently trashed article.

Actual result:

Error 500 is displayed: 

Warning: Undefined array key "location"

Expected result:

User is redirected to the draft form.