patch 8.1.0677: look-behind match may use the wrong line number
Problem: Look-behind match may use the wrong line number. (Dominique Pelle)
Solution: Use the line number in regsave instead of the one in behind_pos,
we may be looking at the previous line. (closes #3749)
diff --git a/src/regexp.c b/src/regexp.c
index e055dd3..b761641 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -5582,7 +5582,7 @@
if (has_mbyte)
{
char_u *line =
- reg_getline(behind_pos.rs_u.pos.lnum);
+ reg_getline(rp->rs_un.regsave.rs_u.pos.lnum);
rp->rs_un.regsave.rs_u.pos.col -=
(*mb_head_off)(line, line