Possible fix for 10863. The fix is in line with other error conditions in this method however if implemented this way you can get an error thrown if you list the controls to group and an error in the result if you group the selected controls. So there needs to be some design changes here but perhaps this can resolve the issue in the short term.
added different parent error to group objectList… throwing errors from sell list group and returning Exec_stat.
Merge branch 'bugfix/iss10863' of https://github.com/montegoulding/livecode into bugfix-10863
Added referencing comments (Bug 10863).
Merge branch 'bugfix-10863' into develop
Fixed execution error numbers.