Fix crash when dragging two-directional block signals onto a bridge or tunnel

(cherry picked from commit 4199ba5981b2761d5226ebc89b315f00e62e1a3a)
8 years ago · 095229128d
parent 891fd08e9d
commit 095229128d
1 changed files with 6 additions and 4 deletions
--- a/src/rail_cmd.cpp
+++ b/src/rail_cmd.cpp
@ -1118,10 +1118,12 @@ CommandCost CmdBuildSingleSignal(TileIndex tile, DoCommandFlag flags, uint32 p1,
 						SetBitTunnelBridgeExit(tile);
 					}
 				}
-				SetTunnelBridgeSemaphore(tile, sigvar == SIG_SEMAPHORE);
-				SetTunnelBridgeSemaphore(tile_exit, sigvar == SIG_SEMAPHORE);
-				SetTunnelBridgePBS(tile, is_pbs);
-				SetTunnelBridgePBS(tile_exit, is_pbs);
+				if (p2 == 0 || p2 == 4 || p2 == 8) {
+					SetTunnelBridgeSemaphore(tile, sigvar == SIG_SEMAPHORE);
+					SetTunnelBridgeSemaphore(tile_exit, sigvar == SIG_SEMAPHORE);
+					SetTunnelBridgePBS(tile, is_pbs);
+					SetTunnelBridgePBS(tile_exit, is_pbs);
+				}
 			}
 			if (IsTunnelBridgeExit(tile) && IsTunnelBridgePBS(tile) && !HasTunnelBridgeReservation(tile)) SetTunnelBridgeExitGreen(tile, false);
 			if (IsTunnelBridgeExit(tile_exit) && IsTunnelBridgePBS(tile_exit) && !HasTunnelBridgeReservation(tile_exit)) SetTunnelBridgeExitGreen(tile_exit, false);