Re: emacs crashed on windows-xp

[Richard Stallman]

    It seems that the problem is that in redisplay_internal, the frame title is
    drawn _before_ the windows are updated, so the stuff which depends on 
    actual window contents (such as %l) may fail to render properly -- and
    even crash emacs as we have seen here.

Making the frame title depend on the way the window was displayed is a
somewhat strange thing to do.

    Perhaps a simple fix would be to move the call to x_consider_frame_title
    currently inside prepare_menu_bars to after we have completed the
    window updates...

That would be risky for various reasons (including the one in the
comment).

I think it might be best to disable the use of %l and %c in frame
titles.