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-rw-r--r--src/town_cmd.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp
index 9ef890a91..7be47fa6a 100644
--- a/src/town_cmd.cpp
+++ b/src/town_cmd.cpp
@@ -759,7 +759,7 @@ static bool IsNeighborRoadTile(TileIndex tile, const DiagDirection dir, uint dis
if (pos & 2) cur += tid_lt[2];
cur = (uint)(pos / 4) * cur; // Multiply for the fitting distance
- if (GetTownRoadBits(TILE_ADD(tile, cur)) & DiagDirToRoadBits((pos & 2) ? dir : ReverseDiagDir(dir))) return true;
+ if (IsValidTile(tile + TileXY(TileX(cur) / 2, TileY(cur) / 2)) && IsValidTile(tile + cur) && GetTownRoadBits(TILE_ADD(tile, cur)) & DiagDirToRoadBits((pos & 2) ? dir : ReverseDiagDir(dir))) return true;
}
return false;
}
@@ -1135,6 +1135,8 @@ static void GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, DiagDirection t
/* Don't walk into water. */
if (IsWaterTile(house_tile)) return;
+ if (!IsValidTile(house_tile) || !IsValidTile(house_tile + TileOffsByDiagDir(target_dir))) return;
+
switch (t1->GetActiveLayout()) {
default: NOT_REACHED();