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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.1093
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.1093
+Problem:    New regexp engine: When a sub expression is empty \1 skips a
+	    character.
+Solution:   Make \1 try the current position when the match is emtpy.
+Files:	    src/regexp_nfa.c, src/testdir/test64.in, src/testdir/test64.ok
+
+
+*** ../vim-7.3.1092/src/regexp_nfa.c	2013-06-02 15:55:52.000000000 +0200
+--- src/regexp_nfa.c	2013-06-02 16:03:28.000000000 +0200
+***************
+*** 4435,4445 ****
+  		{
+  		    if (bytelen == 0)
+  		    {
+! 			/* empty match always works, add NFA_SKIP with zero to
+! 			 * be used next */
+! 			addstate_here(thislist, t->state->out, &t->subs,
+  								    &listidx);
+- 			thislist->t[listidx + 1].count = 0;
+  		    }
+  		    else if (bytelen <= clen)
+  		    {
+--- 4435,4444 ----
+  		{
+  		    if (bytelen == 0)
+  		    {
+! 			/* empty match always works, output of NFA_SKIP to be
+! 			 * used next */
+! 			addstate_here(thislist, t->state->out->out, &t->subs,
+  								    &listidx);
+  		    }
+  		    else if (bytelen <= clen)
+  		    {
+*** ../vim-7.3.1092/src/testdir/test64.in	2013-06-01 19:54:39.000000000 +0200
+--- src/testdir/test64.in	2013-06-02 16:02:56.000000000 +0200
+***************
+*** 361,366 ****
+--- 361,367 ----
+  :call add(tl, [2, '\(\i\+\) \1', ' abc abc', 'abc abc', 'abc'])
+  :call add(tl, [2, '\(\i\+\) \1', 'xgoo goox', 'goo goo', 'goo'])
+  :call add(tl, [2, '\(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9', 'xabcddefghiabcddefghix', 'abcddefghiabcddefghi', 'a', 'b', 'c', 'dd', 'e', 'f', 'g', 'h', 'i'])
++ :call add(tl, [2, '\(\d*\)a \1b', ' a b ', 'a b', ''])
+  :"
+  :"""" Look-behind with limit
+  :call add(tl, [2, '<\@<=span.', 'xxspanxx<spanyyy', 'spany'])
+*** ../vim-7.3.1092/src/testdir/test64.ok	2013-06-01 19:54:39.000000000 +0200
+--- src/testdir/test64.ok	2013-06-02 16:06:44.000000000 +0200
+***************
+*** 815,820 ****
+--- 815,823 ----
+  OK 0 - \(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9
+  OK 1 - \(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9
+  OK 2 - \(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9
++ OK 0 - \(\d*\)a \1b
++ OK 1 - \(\d*\)a \1b
++ OK 2 - \(\d*\)a \1b
+  OK 0 - <\@<=span.
+  OK 1 - <\@<=span.
+  OK 2 - <\@<=span.
+*** ../vim-7.3.1092/src/version.c	2013-06-02 15:55:52.000000000 +0200
+--- src/version.c	2013-06-02 16:03:55.000000000 +0200
+***************
+*** 730,731 ****
+--- 730,733 ----
+  {   /* Add new patch number below this line */
++ /**/
++     1093,
+  /**/
+
+-- 
+Well, you come from nothing, you go back to nothing...  What have you
+lost?  Nothing!
+				-- Monty Python: The life of Brian
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///