Date: Wed, 30 Mar 2016 19:32:49 +0200
From: martin rudalics <rudalics@gmx.at>
In my .emacs for Windows I have for many years the following settings.
(setq w32-pass-lwindow-to-system nil)
(setq w32-lwindow-modifier 'hyper) ; lwindow is hyper
(global-set-key [(control hyper meta b)] 'break-point-insert)
‘break-point-insert’ is a command that inserts a breakpoint into the
*gud-emacs.exe* buffer. This command works fine in emacs-25 but fails
in master when running GDB. In particular, it fails _after_ focus has
shifted to the debugged frame and I shifted it back to the debugger
frame. The command actually executed by C-H-M b is then ‘backward-sexp’
which means that apparently ‘w32-lwindow-modifier’ has been unset and my
modifier given back to the system.
I believe that I have seen similar "unsettings" in other occasions as
well but the example given here is the only one I can confirm.