From b9413ea250a746bb6fd325b9bc1f0f3083f2b04b Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Wed, 17 Mar 2021 20:35:48 +0000
Subject: [PATCH] Remove assert from UpdateSignalsOnSegment that globset is
 empty

Just do the right thing if it isn't empty instead of asserting
---
 src/pbs.cpp    | 4 +---
 src/signal.cpp | 3 ++-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/pbs.cpp b/src/pbs.cpp
index 589ca63fb3..44123c6105 100644
--- a/src/pbs.cpp
+++ b/src/pbs.cpp
@@ -241,9 +241,7 @@ void UnreserveRailTrack(TileIndex tile, Track t)
 					if (IsTunnelBridgePBS(tile)) {
 						SetTunnelBridgeExitSignalState(tile, SIGNAL_STATE_RED);
 					} else {
-						UpdateSignalsInBufferIfOwnerNotAddable(GetTileOwner(tile));
-						AddSideToSignalBuffer(tile, INVALID_DIAGDIR, GetTileOwner(tile));
-						UpdateSignalsInBuffer();
+						UpdateSignalsOnSegment(tile, INVALID_DIAGDIR, GetTileOwner(tile));
 					}
 				}
 				MarkBridgeOrTunnelDirtyOnReservationChange(tile, VMDF_NOT_MAP_MODE);
diff --git a/src/signal.cpp b/src/signal.cpp
index ef52a32807..5549564be3 100644
--- a/src/signal.cpp
+++ b/src/signal.cpp
@@ -822,9 +822,10 @@ void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner)
  */
 SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner)
 {
-	assert(_globset.IsEmpty());
+	UpdateSignalsInBufferIfOwnerNotAddable(owner);
 	_globset.Add(tile, side);
 
+	_last_owner = INVALID_OWNER;
 	return UpdateSignalsInBuffer(owner);
 }