From bd467f94ab81b1181738c4db52e8004c569b4caf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kr=C3=BCger?=
 <45282134+UweKrueger@users.noreply.github.com>
Date: Sat, 29 May 2021 15:31:52 +0200
Subject: [PATCH] encoding: append `0` to strings for compatibility (#10249)

---
 vlib/encoding/base64/base64.v | 6 ++++--
 vlib/rand/rand.v              | 5 ++++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/vlib/encoding/base64/base64.v b/vlib/encoding/base64/base64.v
index 55fbe67a01..8610471fc2 100644
--- a/vlib/encoding/base64/base64.v
+++ b/vlib/encoding/base64/base64.v
@@ -35,7 +35,8 @@ pub fn decode_str(data string) string {
 		return ''
 	}
 	unsafe {
-		buffer := malloc(size)
+		buffer := malloc(size + 1)
+		buffer[size] = 0
 		return tos(buffer, decode_in_buffer(data, buffer))
 	}
 }
@@ -61,7 +62,8 @@ fn alloc_and_encode(src &byte, len int) string {
 		return ''
 	}
 	unsafe {
-		buffer := malloc(size)
+		buffer := malloc(size + 1)
+		buffer[size] = 0
 		return tos(buffer, encode_from_buffer(buffer, src, len))
 	}
 }
diff --git a/vlib/rand/rand.v b/vlib/rand/rand.v
index d9c40ed8b6..52dc0a3f86 100644
--- a/vlib/rand/rand.v
+++ b/vlib/rand/rand.v
@@ -197,12 +197,15 @@ pub fn string_from_set(charset string, len int) string {
 	if len == 0 {
 		return ''
 	}
-	mut buf := unsafe { malloc(len) }
+	mut buf := unsafe { malloc(len + 1) }
 	for i in 0 .. len {
 		unsafe {
 			buf[i] = charset[intn(charset.len)]
 		}
 	}
+	unsafe {
+		buf[len] = 0
+	}
 	return unsafe { buf.vstring_with_len(len) }
 }