From f3d526eda77cef820985bbbb86cd56a627537541 Mon Sep 17 00:00:00 2001
From: SX <50966843+S-S-X@users.noreply.github.com>
Date: Tue, 25 Feb 2020 21:42:57 +0200
Subject: [PATCH] Prevent punching with invalid userdata (#64)

Fixes for https://github.com/pandorabox-io/pandorabox.io/issues/445
---
 util.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/util.lua b/util.lua
index aca1c07..d69ea71 100644
--- a/util.lua
+++ b/util.lua
@@ -325,6 +325,9 @@ local damage_def = {
 	damage_groups = {},
 }
 digtron.damage_creatures = function(player, source_pos, target_pos, amount, items_dropped)
+	if type(player) ~= 'userdata' then
+		return
+	end
 	local objects = minetest.env:get_objects_inside_radius(target_pos, 1.0)
 	if objects ~= nil then
 		damage_def.damage_groups.fleshy = amount
@@ -433,4 +436,4 @@ digtron.show_offset_markers = function(pos, offset, period)
 		local entity = safe_add_entity({x=buildpos.x, y=buildpos.y, z=z_pos + period}, "digtron:marker")
 		if entity ~= nil then entity:setyaw(1.5708) end
 	end
-end
\ No newline at end of file
+end