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.
diff --git a/src/screen.c b/src/screen.c
index f10f70d..c6d8f0e 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -7800,20 +7800,21 @@
int regprog_is_copy = (shl != &search_hl && cur != NULL
&& shl == &cur->hl
&& cur->match.regprog == cur->hl.rm.regprog);
+ int timed_out = FALSE;
nmatched = vim_regexec_multi(&shl->rm, win, shl->buf, lnum,
matchcol,
#ifdef FEAT_RELTIME
- &(shl->tm)
+ &(shl->tm), &timed_out
#else
- NULL
+ NULL, NULL
#endif
);
/* Copy the regprog, in case it got freed and recompiled. */
if (regprog_is_copy)
cur->match.regprog = cur->hl.rm.regprog;
- if (called_emsg || got_int)
+ if (called_emsg || got_int || timed_out)
{
/* Error while handling regexp: stop using this regexp. */
if (shl == &search_hl)