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/syntax.c

diff --git a/src/syntax.c b/src/syntax.c
index 56d69c6..a7b3084 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -3303,7 +3303,7 @@
 #endif
 
     rmp->rmm_maxcol = syn_buf->b_p_smc;
-    r = vim_regexec_multi(rmp, syn_win, syn_buf, lnum, col, NULL);
+    r = vim_regexec_multi(rmp, syn_win, syn_buf, lnum, col, NULL, NULL);
 
 #ifdef FEAT_PROFILE
     if (syn_time_on)