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new lexing bug, and possible fix

X-seq: zsh-workers 1671
From: Zefram <A.Main@xxxxxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxxxxxxxxxx (Z Shell workers mailing list)
Subject: new lexing bug, and possible fix
Date: Tue, 16 Jul 1996 20:44:18 +0100 (BST)

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zsh -fc 'echo ${'

      Index: Src/lex.c
      ===================================================================
      RCS file: /home/zefram/usr/cvsroot/zsh/Src/lex.c,v
      retrieving revision 1.7
      diff -c -r1.7 lex.c
      *** lex.c	1996/07/16 14:26:55	1.7
      --- lex.c	1996/07/16 18:20:32
      ***************
      *** 715,721 ****
        		}
        		c = Outpar;
        	    } else {
      ! 		if (e == '{') {
        		    add(c);
        		    c = Inbrace;
        		    ++bct;
      --- 715,721 ----
        		}
        		c = Outpar;
        	    } else {
      ! 		if (e == '{') { /*}*/
        		    add(c);
        		    c = Inbrace;
        		    ++bct;
      ***************
      *** 768,774 ****
        	    break;
        	case LX2_INBRACE:
        	    if (isset(IGNOREBRACES) || sub)
      ! 		c = '{';
        	    else {
        		if (in_brace_param)
        		    cmdpush(CS_BRACE);
      --- 768,774 ----
        	    break;
        	case LX2_INBRACE:
        	    if (isset(IGNOREBRACES) || sub)
      ! 		c = '{'; /*}*/
        	    else {
        		if (in_brace_param)
        		    cmdpush(CS_BRACE);
      ***************
      *** 964,969 ****
      --- 964,972 ----
          brk:
            hungetc(c);
            *bptr = '\0';
      +     if (in_brace_param)
      + 	while(bct-- >= in_brace_param)
      + 	    cmdpop();
            DPUTS(cmdsp != ocmdsp, "BUG: gettok: cmdstack changed.");
            return peek;
        }

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