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/normal.c

diff --git a/src/normal.c b/src/normal.c
index 7b3f94a..74a5efe 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -4358,7 +4358,7 @@
     {
 	valid = FALSE;
 	t = searchit(curwin, curbuf, &curwin->w_cursor, FORWARD,
-			    pat, 1L, searchflags, RE_LAST, (linenr_T)0, NULL);
+		       pat, 1L, searchflags, RE_LAST, (linenr_T)0, NULL, NULL);
 	if (curwin->w_cursor.lnum >= old_pos.lnum)
 	    t = FAIL;	/* match after start is failure too */
 
@@ -6380,7 +6380,7 @@
     curwin->w_set_curswant = TRUE;
 
     i = do_search(cap->oap, dir, pat, cap->count1,
-			   opt | SEARCH_OPT | SEARCH_ECHO | SEARCH_MSG, NULL);
+		      opt | SEARCH_OPT | SEARCH_ECHO | SEARCH_MSG, NULL, NULL);
     if (i == 0)
 	clearop(cap->oap);
     else