From e07d4130950bf8c3674a5eb7e86678a1f1e550d2 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Mon, 18 Mar 2019 23:46:13 +0100
Subject: [PATCH] - fixed: A pusher thinker must destroy itself if the point
 pusher/puller thing is gone.

---
 src/g_shared/a_pusher.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/g_shared/a_pusher.cpp b/src/g_shared/a_pusher.cpp
index bd9a40e5f..92cb502f7 100644
--- a/src/g_shared/a_pusher.cpp
+++ b/src/g_shared/a_pusher.cpp
@@ -193,6 +193,11 @@ void DPusher::Tick ()
 
 	if (m_Type == p_push)
 	{
+		if (m_Source == nullptr)
+		{
+			Destroy();
+			return;
+		}
 		// Seek out all pushable things within the force radius of this
 		// point pusher. Crosses sectors, so use blockmap.