Manually expiring versions of a web content article will return an exception when viewing it

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.0 CE RC1
• Fix Version/s: 6.0.X EE, 6.1.0 CE RC1, --Sprint 11/12, 6.2.0 CE M2
• Component/s: Web Content > Web Content Administration
• Labels: None
• Branch Version/s:
  6.0.x
• Backported to Branch:
  Committed
• Epic/Theme:
  • WCM
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/3208

Manually expiring versions of a web content article will return an exception when viewing it

To reproduce:

1. Create a basic web content article through control panel and publish it.
2. Edit the article and publish again. You will now have 2 versions of this article (1.0, 1.1)
3. Add an asset publisher to the welcome page
4. Now go back to the article in control panel, edit it and view history
5. Manually expire 1.1
6. Manually expire 1.0
7. When you refresh the welcome page, you'll see an exception in the log. Similar stacktrace attached.