Subject: (25.0.94; Menu corrupted after being used

From: Tino Calancha <[email-masked]>
Date: Wed, 1 Jun 2016 23:57:52 +0900 (JST)

A menu initialized correctly may become corrupted after
being used:

emacs -Q ~
;;; Click left mouse on menu "Regexp"
;; choose mark %g and match something, for instance
tmp RET
;;; Click again on menu "Regexp"
;; Now menu "Regexp" menu is corrupted!

In GNU Emacs 25.0.94.2 (x86_64-pc-linux-gnu, GTK+ Version 3.20.4)
  of 2016-06-01 built on calancha-pc
Repository revision: 9c28e70b4b4b1887030e41103b5f6dd8304585e6
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description:	Debian GNU/Linux testing (stretch)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11