From dacab890cc3b44fe3be59c8df6af48dd135a8a94 Mon Sep 17 00:00:00 2001
From: worktycho <work.tycho@gmail.com>
Date: Tue, 29 Sep 2015 18:10:04 +0100
Subject: The bottom layer cannot hold a valid spawn point

Fixes #2510
---
 src/World.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/World.cpp b/src/World.cpp
index 824ebf3fa..de0dc6ea5 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -624,6 +624,12 @@ void cWorld::GenerateRandomSpawn(void)
 
 bool cWorld::CheckPlayerSpawnPoint(int a_PosX, int a_PosY, int a_PosZ)
 {
+	// The bottom layer cannot hold a valid spawn point
+	if (a_PosY <= 0)
+	{
+		return false;
+	}
+
 	// Check that spawnblock and surrounding blocks are neither solid nor water / lava
 	static const struct
 	{
-- 
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