Re: emacs crashed on windows-xp

[Jason Rumney <jasonr@gnu.org>]

Chong Yidong wrote:
>       case 'c':
> !       /* %c and %l are ignored in `frame-title-format'.
> !          (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, or
> !          even crash emacs.)  */
> !       if (mode_line_target == MODE_LINE_TITLE)
> ! 	return "";
>   
...
>       case 'l':
>         {
> ! 	int startpos, startpos_byte, line, linepos, linepos_byte;
> ! 	int topline, nlines, junk, height;
> ! 
> ! 	/* %c and %l are ignored in `frame-title-format'.  */
> ! 	if (mode_line_target == MODE_LINE_TITLE)
> ! 	  return "";
>   

I think it would be better to return "%c" and "%l", then it will be more 
obvious to users that those format specifiers are not handled in the 
title-bar. Returning a blank string makes it look like those specifiers 
were handled in some way, and may lead to bug reports.