From af279639387e4cc1171cdb2cdaff0256a1e54be4 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Fri, 12 Jun 2020 17:20:51 +0000
Subject: [PATCH] string: do not free empty strings

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

diff --git a/vlib/builtin/string.v b/vlib/builtin/string.v
index 2591742d4a..0bc5b8475e 100644
--- a/vlib/builtin/string.v
+++ b/vlib/builtin/string.v
@@ -1183,7 +1183,9 @@ pub fn (c byte) is_letter() bool {
 }
 
 pub fn (s &string) free() {
-	if s.is_lit {return}
+	if s.is_lit || s.len == 0 {
+		return
+	}
 	free(s.str)
 }