From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from math.gatech.edu (euclid.skiles.gatech.edu [130.207.146.50]) by werple.net.au (8.7/8.7.1) with SMTP id CAA08180 for <mason@werple.mira.net.au>; Wed, 8 Nov 1995 02:09:01 +1100 (EST)
Received: by math.gatech.edu (5.x/SMI-SVR4)
	id AA08107; Tue, 7 Nov 1995 09:54:44 -0500
Resent-Date: Tue, 7 Nov 1995 15:54:59 +0100 (MET)
Old-Return-Path: <pws@ifh.de>
From: pws@ifh.de (Peter William Stephenson)
Message-Id: <9511071455.AA00926@sgi.ifh.de>
Subject: unpleasant substitution bug
To: zsh-workers@math.gatech.edu (Zsh hackers list)
Date: Tue, 7 Nov 1995 15:54:59 +0100 (MET)
X-Mailer: ELM [version 2.4 PL24]
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Resent-Message-Id: <"ArJiv.0.b-1.pCtdm"@euclid>
Resent-From: zsh-workers@math.gatech.edu
X-Mailing-List: <zsh-workers@math.gatech.edu> archive/latest/545
X-Loop: zsh-workers@math.gatech.edu
Precedence: list
Resent-Sender: zsh-workers-request@math.gatech.edu

I can't believe this bug's still there.  The proper answer is probably
to upgrade to Zoltan's substitution code as soon as possible.  Until
then, it's bad enough to need fixing anyway.

% unset EMACS
% print ${EMACS:-}
}

uurgh.

*** Src/subst.c~	Tue Nov  7 04:43:21 1995
--- Src/subst.c	Tue Nov  7 15:47:00 1995
***************
*** 903,913 ****
  	if (!(flags & 0xf8))
  	    flags |= 16;
  
! 	for (bct = 1; bct && *++s;) {
  	    if (*s == '{' || *s == Inbrace)
  		bct++;
  	    else if (*s == '}' || *s == Outbrace)
! 		bct--;
  	}
  
  	if (*s)
--- 903,914 ----
  	if (!(flags & 0xf8))
  	    flags |= 16;
  
! 	for (bct = 1; *s; s++) {
  	    if (*s == '{' || *s == Inbrace)
  		bct++;
  	    else if (*s == '}' || *s == Outbrace)
! 		if (!--bct)
! 		    break;
  	}
  
  	if (*s)

-- 
Peter Stephenson <pws@ifh.de>       Tel: +49 33762 77366
WWW:  http://www.ifh.de/~pws/       Fax: +49 33762 77330
Deutches Electronen-Synchrotron --- Institut fuer Hochenergiephysik Zeuthen
DESY-IfH, 15735 Zeuthen, Germany.