From 36ff81d81a339a5b0dbd6e80d0996e1cebfbeb91 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Sun, 3 Dec 2017 15:42:55 +0100
Subject: util.crand: Return early if a zero bytes are requested

---
 util-src/crand.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'util-src')

diff --git a/util-src/crand.c b/util-src/crand.c
index 20871f3e..160ac1f6 100644
--- a/util-src/crand.c
+++ b/util-src/crand.c
@@ -73,11 +73,15 @@ int Lrandom(lua_State *L) {
 	const size_t len = l;
 	luaL_argcheck(L, l >= 0, 1, "must be > 0");
 
+	if(len == 0) {
+		lua_pushliteral(L, "");
+		return 1;
+	}
+
 	if(len > SMALLBUFSIZ) {
 		buf = lua_newuserdata(L, len);
 	}
 
-
 #if defined(WITH_GETRANDOM)
 	/*
 	 * This acts like a read from /dev/urandom with the exception that it
-- 
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