From c300bbf52e9a97248ba57ab8e10b0a5c38c369d4 Mon Sep 17 00:00:00 2001
From: Hisham Muhammad <hisham@gobolinux.org>
Date: Mon, 2 Sep 2019 16:49:56 -0300
Subject: Fix version detection

---
 src/luarocks/util.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/luarocks/util.lua b/src/luarocks/util.lua
index d4461c92..13ddf895 100644
--- a/src/luarocks/util.lua
+++ b/src/luarocks/util.lua
@@ -436,6 +436,9 @@ do
          return nil
       end
       local lv, err = util.popen_read(Q(lua_exe) .. ' -e "io.write(_VERSION:sub(5))"')
+      if lv == "" then
+         return nil
+      end
       if luaver and luaver ~= lv then
          return nil
       end
-- 
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