commit fbd0b0af6800f6ff89857863d6a07ea03f09ff6c
author Bram Moolenaar <Bram@vim.org> Sat Jun 17 18:44:21 2017 +0200
committer Bram Moolenaar <Bram@vim.org> Sat Jun 17 18:44:21 2017 +0200
tree d970232ff584511e30efcfe2f7ea5eefb9e9f8d4
parent 8cf91286ca46a501d24e4b7d631b193256782c88

patch 8.0.0643: when a pattern search is slow Vim becomes unusable

Problem:    When 'hlsearch' is set and matching with the last search pattern
            is very slow, Vim becomes unusable.  Cannot quit search by
            pressing CTRL-C.
Solution:   When the search times out set a flag and don't try again.  Check
            for timeout and CTRL-C in NFA loop that adds states.

src/ex_cmds.c

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 859b8c6..59531be 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -5096,7 +5096,7 @@
 		); ++lnum)
     {
 	nmatch = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
-							    (colnr_T)0, NULL);
+						       (colnr_T)0, NULL, NULL);
 	if (nmatch)
 	{
 	    colnr_T	copycol;
@@ -5695,7 +5695,7 @@
 			|| nmatch_tl > 0
 			|| (nmatch = vim_regexec_multi(&regmatch, curwin,
 							curbuf, sub_firstlnum,
-							 matchcol, NULL)) == 0
+						    matchcol, NULL, NULL)) == 0
 			|| regmatch.startpos[0].lnum > 0)
 		{
 		    if (new_start != NULL)
@@ -5760,7 +5760,7 @@
 		    }
 		    if (nmatch == -1 && !lastone)
 			nmatch = vim_regexec_multi(&regmatch, curwin, curbuf,
-					       sub_firstlnum, matchcol, NULL);
+					  sub_firstlnum, matchcol, NULL, NULL);
 
 		    /*
 		     * 5. break if there isn't another match in this line
@@ -6012,7 +6012,7 @@
     {
 	lnum = curwin->w_cursor.lnum;
 	match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
-							     (colnr_T)0, NULL);
+						       (colnr_T)0, NULL, NULL);
 	if ((type == 'g' && match) || (type == 'v' && !match))
 	    global_exe_one(cmd, lnum);
     }
@@ -6025,7 +6025,7 @@
 	{
 	    /* a match on this line? */
 	    match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
-							     (colnr_T)0, NULL);
+						       (colnr_T)0, NULL, NULL);
 	    if ((type == 'g' && match) || (type == 'v' && !match))
 	    {
 		ml_setmarked(lnum);