Recording completed payment for Pending membership from Edit Membership throws fatal error

• • • This is a regression from 4.4 ****
      =====Steps to recreate ==========
      Enable debug/backtrace
      Update sample contribution page id=2 to allow Pay Later
      Submit a paylater online membership signup
      Go to the contact record => Memberships tab
      Edit the membership (best if you do this in a separate tab so you can see the backtrace)
      Check "Update Payment Status" and set Payment status = Completed
      Click Save

The membership and contribution statuses are actually successfully updated. However a fatal error is thrown.

===== Fatal Error ========
#0 /Users/dgg/git/crm_v4.5/CRM/Core/Error.php(380): CRM_Core_Error::backtrace()
#1 /Users/dgg/git/crm_v4.5/CRM/Core/DAO.php(946): CRM_Core_Error::fatal()
#2 /Users/dgg/git/crm_v4.5/CRM/Member/Form/Membership.php(1554): CRM_Core_DAO::getFieldValue("CRM_Price_DAO_PriceField", NULL, "price_set_id")
#3 /Users/dgg/git/crm_v4.5/CRM/Core/Form.php(328): CRM_Member_Form_Membership->postProcess()
#4 /Users/dgg/git/crm_v4.5/CRM/Core/QuickForm/Action/Upload.php(158): CRM_Core_Form->mainProcess()
#5 /Users/dgg/git/crm_v4.5/CRM/Core/QuickForm/Action/Upload.php(129): CRM_Core_QuickForm_Action_Upload->realPerform(Object(CRM_Member_Form_Membership), "upload")
#6 /Users/dgg/git/crm_v4.5/packages/HTML/QuickForm/Controller.php(203): CRM_Core_QuickForm_Action_Upload->perform(Object(CRM_Member_Form_Membership), "upload")
#7 /Users/dgg/git/crm_v4.5/packages/HTML/QuickForm/Page.php(103): HTML_QuickForm_Controller->handle(Object(CRM_Member_Form_Membership), "upload")
#8 /Users/dgg/git/crm_v4.5/CRM/Core/Controller.php(356): HTML_QuickForm_Page->handle("upload")
#9 /Users/dgg/git/crm_v4.5/CRM/Member/Page/Tab.php(285): CRM_Core_Controller->run()
#10 /Users/dgg/git/crm_v4.5/CRM/Member/Page/Tab.php(360): CRM_Member_Page_Tab->edit()