Fatal error when attempting to update membership line items.

Created by: agileware-fj

Steps to reproduce:

1. Renew a membership, recording a contribution.
2. Edit the contribution, open line item in edit
3. Change the line item quantity.
4. Save the line item.

Results:

"A fatal error was triggered"

Expected outcome:

Contribution is updated with higher quantity in line item, and probably the number of terms that the membership renewal is for is changed to match (ideal behaviour)

---

This appears to be a result of the edit trying to update or create a participant record when there is no participant or event.

Backtrace:

#1 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/DAO.php(1130): CRM_Core_Error::fatal()
#2 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Event/BAO/Participant.php(317): CRM_Core_DAO::getFieldValue("CRM_Event_DAO_Event", NULL, "title")
#3 /home/all-stars-47/public_html/sites/all/modules/civicrm/api/v3/Participant.php(56): CRM_Event_BAO_Participant::create((Array:6))
#4 /home/all-stars-47/public_html/sites/all/modules/civicrm/Civi/API/Provider/MagicFunctionProvider.php(89): civicrm_api3_participant_create((Array:4))
#5 /home/all-stars-47/public_html/sites/all/modules/civicrm/Civi/API/Kernel.php(169): Civi\API\Provider\MagicFunctionProvider->invoke((Array:9))
#6 /home/all-stars-47/public_html/sites/all/modules/civicrm/Civi/API/Kernel.php(100): Civi\API\Kernel->runRequest((Array:7))
#7 /home/all-stars-47/public_html/sites/all/modules/civicrm/api/api.php(43): Civi\API\Kernel->runSafe("Participant", "create", (Array:4))
#8 /home/all-stars-47/public_html/CRM/extensions/biz.jmaconsulting.lineitemedit/CRM/Lineitemedit/Form/Edit.php(248): civicrm_api3("Participant", "create", (Array:3))
#9 /home/all-stars-47/public_html/CRM/extensions/biz.jmaconsulting.lineitemedit/CRM/Lineitemedit/Form/Edit.php(199): CRM_Lineitemedit_Form_Edit->updateEntityRecord((Array:15))
#10 /home/all-stars-47/public_html/CRM/extensions/biz.jmaconsulting.lineitemedit/CRM/Lineitemedit/Form/Edit.php(152): CRM_Lineitemedit_Form_Edit->submit((Array:10))
#11 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/Form.php(447): CRM_Lineitemedit_Form_Edit->postProcess()
#12 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/QuickForm/Action/Submit.php(74): CRM_Core_Form->mainProcess()
#13 /home/all-stars-47/public_html/sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php(203): CRM_Core_QuickForm_Action_Submit->perform(Object(CRM_Lineitemedit_Form_Edit), "submit")
#14 /home/all-stars-47/public_html/sites/all/modules/civicrm/packages/HTML/QuickForm/Page.php(103): HTML_QuickForm_Controller->handle(Object(CRM_Lineitemedit_Form_Edit), "submit")
#15 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/Controller.php(351): HTML_QuickForm_Page->handle("submit")
#16 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Utils/Wrapper.php(113): CRM_Core_Controller->run()
#17 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/Invoke.php(283): CRM_Utils_Wrapper->run("CRM_Lineitemedit_Form_Edit", "Edit Item", NULL)
#18 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/Invoke.php(84): CRM_Core_Invoke::runItem((Array:13))
#19 /home/all-stars-47/public_html/sites/all/modules/civicrm/CRM/Core/Invoke.php(52): CRM_Core_Invoke::_invoke((Array:3))
#20 /home/all-stars-47/public_html/sites/all/modules/civicrm/drupal/civicrm.module(445): CRM_Core_Invoke::invoke((Array:3))
#21 [internal function](): civicrm_invoke("lineitem", "edit")
#22 /home/all-stars-47/public_html/includes/menu.inc(527): call_user_func_array("civicrm_invoke", (Array:2))
#23 /home/all-stars-47/public_html/index.php(21): menu_execute_active_handler()
#24 {main}```