Your bug report

#72511: 30.0.50; prefix-completions is always nil in help--symbol-completion-table

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 72511@debbugs.gnu.org.

-- 
72511: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=72511
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems