From 98b81252b78f9cbc51941b369819d829d5f1f92c Mon Sep 17 00:00:00 2001
From: BigBlack <840206@qq.com>
Date: Fri, 27 Dec 2019 12:20:06 +0800
Subject: [PATCH] fix #3217 (string.replace)

---
 vlib/builtin/string.v      | 2 +-
 vlib/builtin/string_test.v | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/vlib/builtin/string.v b/vlib/builtin/string.v
index 04c282cf08..8a44b4b300 100644
--- a/vlib/builtin/string.v
+++ b/vlib/builtin/string.v
@@ -152,7 +152,7 @@ pub fn (s string) replace(rep, with string) string {
 			break
 		}
 		idxs << idx
-		idx++
+		idx += rep.len
 	}
 	// Dont change the string if there's nothing to replace
 	if idxs.len == 0 {
diff --git a/vlib/builtin/string_test.v b/vlib/builtin/string_test.v
index 1c7b0336b5..b2fbbd0acc 100644
--- a/vlib/builtin/string_test.v
+++ b/vlib/builtin/string_test.v
@@ -220,6 +220,9 @@ fn test_replace() {
 	assert b.replace('charptr', 'byteptr') == '*byteptr'
 	c :='abc'
 	assert c.replace('','-') == c
+	v :='a   b c d'
+	assert v.replace('  ',' ') == 'a  b c d'
+
 }
 
 fn test_replace_each() {