Your bug report

#19511: 25.0.50; Failed assertions in redisplay() code. (dispnew.c:1405; xdisp.c:17524)

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 19511@debbugs.gnu.org.

-- 
19511: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19511
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems