From 3111ec97bb27894a225b616bae55f88478e737b5 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Thu, 26 Apr 2018 16:55:06 +0300
Subject: [PATCH] Fixed crash during line tracing when enter sector is null

https://forum.zdoom.org/viewtopic.php?t=60371
---
 src/p_trace.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/p_trace.cpp b/src/p_trace.cpp
index eae7d6fd6..48e49dba0 100644
--- a/src/p_trace.cpp
+++ b/src/p_trace.cpp
@@ -637,7 +637,7 @@ cont:
 
 		case TRACE_Skip:
 			Results->HitType = TRACE_HitNone;
-			if (!special3dpass && (TraceFlags & TRACE_3DCallback) && entersector->e->XFloor.ffloors.Size())
+			if (!special3dpass && (TraceFlags & TRACE_3DCallback) && entersector && entersector->e->XFloor.ffloors.Size())
 				return LineCheck(in, dist, hit, true);
 			break;
 
@@ -646,7 +646,7 @@ cont:
 		}
 	}
 
-	if (Results->HitType == TRACE_HitNone)
+	if (Results->HitType == TRACE_HitNone && entersector)
 	{
 		CurSector = entersector;
 		EnterDist = dist;