From 681ff3cc0d5f99031e9e56c091b4e8d3aabd0943 Mon Sep 17 00:00:00 2001
From: penguindark <57967770+penguindark@users.noreply.github.com>
Date: Sun, 3 Jan 2021 01:33:34 +0100
Subject: [PATCH] regex: bug fix on .* cases (#7823)

---
 vlib/regex/regex.v      | 9 ++++++++-
 vlib/regex/regex_test.v | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/vlib/regex/regex.v b/vlib/regex/regex.v
index 1bd81b3bc2..bd403dc660 100644
--- a/vlib/regex/regex.v
+++ b/vlib/regex/regex.v
@@ -2000,7 +2000,7 @@ pub fn (mut re RE) match_base(in_txt byteptr, in_txt_len int ) (int,int) {
 				// check if we must continue or pass to the next IST
 				if next_check_flag == true && re.prog[state.pc+1].ist != ist_prog_end {
 					//println("save the state!!")
-					re.state_list << StateObj {
+					mut dot_state := StateObj {
 						group_index: state.group_index
 						match_flag:  state.match_flag
 						match_index: state.match_index
@@ -2010,6 +2010,13 @@ pub fn (mut re RE) match_base(in_txt byteptr, in_txt_len int ) (int,int) {
 						char_len:    char_len
 						last_dot_pc: state.pc
 					}
+					// if we are mananging a .* stay on the same char on return
+					if re.prog[state.pc].rep_min == 0 {
+						dot_state.i -= char_len
+					}
+
+					re.state_list << dot_state
+					
 					m_state = .ist_quant_n
 					//println("dot_char stack len: ${re.state_list.len}")
 					continue
diff --git a/vlib/regex/regex_test.v b/vlib/regex/regex_test.v
index 36dd9d3bd1..1ed54769cc 100644
--- a/vlib/regex/regex_test.v
+++ b/vlib/regex/regex_test.v
@@ -124,6 +124,7 @@ match_test_suite = [
 	TestItem{"accccb deer", r"^(.*)$",0,11},
 	TestItem{"accccb deer", r"^a(.*)b d(.+)p",-1,0},
 	TestItem{"##.#....#.##.####...#.##", r".{18}[.#]",0,19},
+	TestItem{"#.#......##.#..#..##........##....###...##...######.......#.....#..#......#...#........###.#..#.", r'.*#[.#]{4}##[.#]{4}##[.#]{4}###',0,49},
 
 	// test bcksls chars
 	TestItem{"[ an s. s! ]( wi4ki:something )", r"\[.*\]\( *(\w*:*\w+) *\)",0,31},