Re: address@hidden: RE: weird defadvice bug with byte-compilation]

[Richard M. Stallman]

    +   /* Do this before the call to w32_window, since that can call Feval
    +      (e.g., to compute the frame's menu bar) and throw an error, which
    +      will leave this frame unregistered.  */
    +   Vframe_list = Fcons (frame, Vframe_list);
    + 
        w32_window (f, window_prompting, minibuffer_only);
        x_icon (f, parameters);
        x_make_gc (f);


Changing Vframe_list so early, before calling w32_window, could be
dangerous.  What if some part of window creation fails, or x_icon, or
x_make_gc?  While I am not sure of how things worn on Windows, if
those fail I suspect it will leave a bad situation.  You would not want
such a frame to be considered live.

I think the right fix is keep the setting of Vframe_list where it was,
and instead move the creation of the menu bar out of w32_window and
put it at a later place in Fx_create_frame.  That would make the code
more like what it is in xfns.c, where the menu bar creation step
is done later, after the frame is already safely in existence.