Previous Next cache error in CiviEvent report dashlet

Fatal error: Class 'CRM_Core_BAO_PrevNextCache' not found in /sites/all/modules/civicrm/CRM/Core/BAO/Cache.php on line 251

I'm seeing this error at the bottom of a CiviEvent report dashlet
Search doesn't find any instances on CiviCRM sites but many on sites using CiviCRM

https://www.google.ca/search?q=Fatal%20error%3A%20Class%20%27CRM_Core_BAO_PrevNextCache%27%20not%20found%20in&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&source=hp&channel=np#q=Fatal+error:+Class+%27CRM_Core_BAO_PrevNextCache%27+not+found+in&hl=en&client=firefox-a&hs=DhK&rls=org.mozilla:en-US:official&channel=np&prmd=imvns&ei=qIRYUKvBB8HF0QG30oDQDA&start=0&sa=N&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&fp=ba784d4cfb638b39&biw=1243&bih=637