bug#21739: 25.0.50; Frame title not updated after killing buffer

[Óscar Fuentes]

emacs -Q

Eval this code in *scratch*:


(global-set-key (kbd "C-k")
                (lambda ()
                  (interactive)
                  (kill-buffer (current-buffer))))

(setq frame-title-format '("Emacs: %b %+%+ %f @ " system-name))


Notice the frame title, which should mention the current buffer's name
(*scratch*). Now press C-k to kill the buffer. *Messages* is shown, but
the frame title keeps mentioning *scratch*.



In GNU Emacs 25.0.50.4 (x86_64-unknown-linux-gnu, X toolkit)
 of 2015-10-23
Repository revision: d4352f813a0703cc7f7a873525131b272ef0c105
Windowing system distributor 'The X.Org Foundation', version 11.0.11702000
System Description:     Ubuntu 15.10

Configured using:
 'configure --without-toolkit-scroll-bars --with-x-toolkit=lucid'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG SOUND GSETTINGS NOTIFY LIBXML2 FREETYPE XFT
ZLIB LUCID X11

Important settings:
  value of $LANG: C
  locale-coding-system: nil

Major mode: Emacs-Lisp