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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.636
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.636 (after 7.3.625)
+Problem:    Not all zero-width matches handled correctly for "gn".
+Solution:   Move zero-width detection to a separate function. (Christian
+	    Brabandt)
+Files:	    src/search.c
+
+
+*** ../vim-7.3.635/src/search.c	2012-08-08 15:27:54.000000000 +0200
+--- src/search.c	2012-08-23 15:52:50.000000000 +0200
+***************
+*** 4526,4531 ****
+--- 4526,4533 ----
+  #endif /* FEAT_TEXTOBJ */
+  
+  #if defined(FEAT_VISUAL) || defined(PROTO)
++ static int is_zerowidth __ARGS((char_u *pattern));
++ 
+  /*
+   * Find next search match under cursor, cursor at end.
+   * Used while an operator is pending, and in Visual mode.
+***************
+*** 4546,4556 ****
+      int		visual_active = FALSE;
+      int		flags = 0;
+      pos_T	save_VIsual;
+-     regmmatch_T	regmatch;
+-     int		nmatched = 0;
+      int		zerowidth = FALSE;
+  
+- 
+      /* wrapping should not occur */
+      p_ws = FALSE;
+  
+--- 4548,4555 ----
+***************
+*** 4583,4606 ****
+      else
+  	orig_pos = pos = start_pos = curwin->w_cursor;
+  
+!     /*
+!      * Check for zero-width pattern.
+!      */
+!     if (search_regcomp(spats[last_idx].pat, RE_SEARCH, RE_SEARCH,
+! 			     ((SEARCH_HIS + SEARCH_KEEP)), &regmatch) == FAIL)
+  	return FAIL;
+  
+-     /* Zero-width pattern should match somewhere, then we can check if start
+-      * and end are in the same position. */
+-     nmatched = vim_regexec_multi(&regmatch, curwin, curbuf,
+- 				     curwin->w_cursor.lnum, (colnr_T)0, NULL);
+-     if (called_emsg)
+- 	return FAIL;
+-     if (nmatched && regmatch.startpos[0].lnum == regmatch.endpos[0].lnum
+- 		 && regmatch.endpos[0].col == regmatch.startpos[0].col)
+- 	zerowidth = TRUE;
+-     vim_free(regmatch.regprog);
+- 
+      /*
+       * The trick is to first search backwards and then search forward again,
+       * so that a match at the current cursor position will be correctly
+--- 4582,4592 ----
+      else
+  	orig_pos = pos = start_pos = curwin->w_cursor;
+  
+!     /* Is the pattern is zero-width? */
+!     zerowidth = is_zerowidth(spats[last_idx].pat);
+!     if (zerowidth == -1)
+  	return FAIL;
+  
+      /*
+       * The trick is to first search backwards and then search forward again,
+       * so that a match at the current cursor position will be correctly
+***************
+*** 4693,4698 ****
+--- 4679,4721 ----
+  
+      return OK;
+  }
++ 
++ /*
++  * Check if the pattern is zero-width.
++  * Returns TRUE, FALSE or -1 for failure.
++  */
++     static int
++ is_zerowidth(pattern)
++     char_u	*pattern;
++ {
++     regmmatch_T	regmatch;
++     int		nmatched = 0;
++     int		result = -1;
++     pos_T       pos;
++ 
++     if (search_regcomp(pattern, RE_SEARCH, RE_SEARCH,
++ 					      SEARCH_KEEP, &regmatch) == FAIL)
++ 	return -1;
++ 
++     /* move to match */
++     clearpos(&pos);
++     if (searchit(curwin, curbuf, &pos, FORWARD, spats[last_idx].pat, 1,
++ 				     SEARCH_KEEP, RE_SEARCH, 0, NULL) != FAIL)
++     {
++ 	/* Zero-width pattern should match somewhere, then we can check if
++ 	 * start and end are in the same position. */
++ 	nmatched = vim_regexec_multi(&regmatch, curwin, curbuf,
++ 						  pos.lnum, (colnr_T)0, NULL);
++ 
++ 	if (!called_emsg)
++ 	    result = (nmatched != 0
++ 		    && regmatch.startpos[0].lnum == regmatch.endpos[0].lnum
++ 		    && regmatch.startpos[0].col == regmatch.endpos[0].col);
++     }
++ 
++     vim_free(regmatch.regprog);
++     return result;
++ }
+  #endif /* FEAT_VISUAL */
+  
+  #if defined(FEAT_LISP) || defined(FEAT_CINDENT) || defined(FEAT_TEXTOBJ) \
+*** ../vim-7.3.635/src/version.c	2012-08-23 13:28:50.000000000 +0200
+--- src/version.c	2012-08-23 15:25:23.000000000 +0200
+***************
+*** 721,722 ****
+--- 721,724 ----
+  {   /* Add new patch number below this line */
++ /**/
++     636,
+  /**/
+
+-- 
+Edison's greatest achievement came in 1879, when he invented the
+electric company.  Edison's design was a brilliant adaptation of the
+simple electrical circuit: the electric company sends electricity
+through a wire to a customer, then immediately gets the electricity
+back through another wire
+
+ /// 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    ///