ImportGen2Map: Fix imports of malformed maps.

Fixes #21126

OpenRA.Game/Map/Map.cs

@@ -776,19 +776,10 @@ namespace OpenRA
 
 			if (Grid.MaximumTerrainHeight > 0)
 			{
-				// The minimap is drawn in cell space, so we need to
+				(top, bottom) = GetCellSpaceBounds();
-				// unproject the PPos bounds to find the MPos boundaries.
-				// This matches the calculation in RadarWidget that is used ingame
-				for (var x = Bounds.Left; x < Bounds.Right; x++)
-				{
-					var allTop = Unproject(new PPos(x, Bounds.Top));
-					var allBottom = Unproject(new PPos(x, Bounds.Bottom));
-					if (allTop.Count > 0)
-						top = Math.Min(top, allTop.MinBy(uv => uv.V).V);
 
-					if (allBottom.Count > 0)
+				if (top == int.MaxValue || bottom == int.MinValue)
-						bottom = Math.Max(bottom, allBottom.MaxBy(uv => uv.V).V);
+					throw new InvalidDataException("The map has invalid boundaries");
-				}
 			}
 			else
 			{
@@ -864,6 +855,28 @@ namespace OpenRA
 			return png.Save();
 		}
 
+		public (int Top, int Bottom) GetCellSpaceBounds()
+		{
+			var top = int.MaxValue;
+			var bottom = int.MinValue;
+
+			// The minimap is drawn in cell space, so we need to
+			// unproject the PPos bounds to find the MPos boundaries.
+			// This matches the calculation in RadarWidget that is used ingame
+			for (var x = Bounds.Left; x < Bounds.Right; x++)
+			{
+				var allTop = Unproject(new PPos(x, Bounds.Top));
+				var allBottom = Unproject(new PPos(x, Bounds.Bottom));
+				if (allTop.Count > 0)
+					top = Math.Min(top, allTop.MinBy(uv => uv.V).V);
+
+				if (allBottom.Count > 0)
+					bottom = Math.Max(bottom, allBottom.MaxBy(uv => uv.V).V);
+			}
+
+			return (top, bottom);
+		}
+
 		public bool Contains(CPos cell)
 		{
 			if (Grid.Type == MapGridType.RectangularIsometric)

OpenRA.Mods.Cnc/UtilityCommands/ImportGen2MapCommand.cs

@@ -421,9 +421,30 @@ namespace OpenRA.Mods.Cnc.UtilityCommands
 			// Calculate Bounds edge tile coordinates.
 			// Reduce bottom and right by 1 because map.SetBounds() increases them.
 			var topLeft = new PPos(left, top);
-			var bottomRight = new PPos(playableAreaWidth + left - 1, playableAreaHeight + unknownHeightPadding + top - 1);
 
-			map.SetBounds(topLeft, bottomRight);
+			if (map.Height.Max() != 0)
+			{
+				// Workaround: Some custom TS maps have invalid boundaries, with no padding area at the bottom
+				// The boundary needs to be reduced until the projections are valid
+				bool hasValidBoundaries;
+				var paddingOffset = 1;
+				do
+				{
+					var bottomRight = new PPos(playableAreaWidth + left - 1, playableAreaHeight + unknownHeightPadding + top - paddingOffset);
+					map.SetBounds(topLeft, bottomRight);
+
+					var (topBound, bottomBound) = map.GetCellSpaceBounds();
+
+					hasValidBoundaries = topBound != int.MaxValue && bottomBound != int.MinValue;
+					paddingOffset++;
+				}
+				while (!hasValidBoundaries);
+			}
+			else
+			{
+				var bottomRight = new PPos(playableAreaWidth + left - 1, playableAreaHeight + unknownHeightPadding + top - 1);
+				map.SetBounds(topLeft, bottomRight);
+			}
 		}
 
 		protected virtual bool TryHandleOverlayToActorInner(CPos cell, byte[] overlayPack, CellLayer<int> overlayIndex, byte overlayType, out ActorReference actorReference)

OpenRA.Mods.Common/FileFormats/IniFile.cs

@@ -44,7 +44,12 @@ namespace OpenRA.Mods.Common.FileFormats
 				{
 					case ';': break;
 					case '[': currentSection = ProcessSection(line); break;
-					default: ProcessEntry(line, currentSection); break;
+					default:
+						// Skip everything before the first section
+						if (currentSection != null)
+							ProcessEntry(line, currentSection);
+
+						break;
 				}
 			}
 		}