From 10e28b8a5369ec37a3f552da31f50f24a655837e Mon Sep 17 00:00:00 2001
From: Mitch Richters <mjr4077au@gmail.com>
Date: Sun, 5 Dec 2021 17:21:28 +1100
Subject: [PATCH] - SW: Add nullptr check inside `ActorTrackDecide()` for
 walltype's `nextSector()` to prevent crashes while noclipping through level.

---
 source/games/sw/src/track.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/games/sw/src/track.cpp b/source/games/sw/src/track.cpp
index 891dc733c..3fbfcf049 100644
--- a/source/games/sw/src/track.cpp
+++ b/source/games/sw/src/track.cpp
@@ -3140,6 +3140,9 @@ bool ActorTrackDecide(TRACK_POINTp tpoint, DSWActor* actor)
                 if (hit.hitWall == nullptr)
                     return false;
 
+                if (hit.hitWall->nextSector() == nullptr)
+                    return false;
+
                 zdiff = labs(sp->z - hit.hitWall->nextSector()->floorz) >> 8;
 
                 u->jump_speed = PickJumpSpeed(actor, zdiff);