From 0c8afdfe13917e3c98d014e88592658a4e1af818 Mon Sep 17 00:00:00 2001
From: Xiphin <Xiphin@qq.com>
Date: Tue, 25 Jun 2019 12:29:02 +0800
Subject: [PATCH] Fix Issues #553

---
 builtin/string.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/string.v b/builtin/string.v
index ba3caf433ebac7..441234ba73b23f 100644
--- a/builtin/string.v
+++ b/builtin/string.v
@@ -584,7 +584,7 @@ fn compare_strings_by_len(a, b *string) int {
 
 fn compare_lower_strings(a, b *string) int {
 	aa := a.to_lower()
-	bb := a.to_lower()
+	bb := b.to_lower()
 	return compare_strings(aa, bb)
 }