Your bug report

#21651: 25.0.50; [PATCH] Memory leak: auto_fontset_alist has keys that are modified externally by mistake

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 21651@debbugs.gnu.org.

-- 
21651: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21651
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems