Bug in Content Search webpart SharePoint 2013

Search is now used pervasively in SharePoint 2013 across different features. Content search webpart is an amazing feature in SharePoint 2013 that provides the flexibility to surface any content in SharePoint pages.

We are using content search webpart in different project but we came through a strange exception throw by the webpart. This is a screen shot for the webpart when the exception happened


This is exception doesn’t occur in a defined pattern or in a certain scenario. We are still investigating this issue and opened a support case with Microsoft.

If you have any clue on this problem please contact me or leave a comment.

Note: We are using SharePoint 2013 RTM