Export from Find Cases search results gives E_NOTICE and E_WARNING when using selected fields
Not sure when it started, just noticed it now while reviewing a PR. Can reproduce on dmaster.demo.
Notice: Undefined index: Select in HTML_QuickForm_Controller->exportValues() (line 495 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php).
Warning: Invalid argument supplied for foreach() in HTML_QuickForm_Controller->exportValues() (line 495 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php).TBD
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