diff options
| -rw-r--r-- | src/town_cmd.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp index e87c4437f..1aadd5927 100644 --- a/src/town_cmd.cpp +++ b/src/town_cmd.cpp @@ -1256,6 +1256,7 @@ static bool GrowTownWithTunnel(const Town* t, const TileIndex tile, const DiagDi /* Only tunnel under a mountain if the slope is continuous for at least 4 tiles. We want tunneling to be a last resort for large hills. */ TileIndex slope_tile = tile; for (uint8 tiles = 0; tiles < 4; tiles++) { + if (!IsValidTile(slope_tile)) return false; slope = GetTileSlope(slope_tile); if (slope != InclinedSlope(tunnel_dir) && !IsSteepSlope(slope) && !IsSlopeWithOneCornerRaised(slope)) return false; slope_tile += delta; |