Fixed, DB2 bug: temporary map file was growing in size after every map save/test, which eventually resulted in integer overflow exception when the file size reached ~2Gb.

Fixed, Draw Geometry modes: fixed a crash when moving the mouse cursor over a linedef while holding Alt-Shift keys when there were no new points drawn in current mode.

Source/Core/General/MapManager.cs

@@ -788,6 +788,9 @@ namespace CodeImp.DoomBuilder
 				General.MainWindow.DisplayStatus(StatusType.Busy, "Building map nodes...");
 				includenodes = (!string.IsNullOrEmpty(nodebuildername) && BuildNodes(nodebuildername, true));
 				General.MainWindow.DisplayStatus(oldstatus);
+
+				//mxd. Compress temp file...
+				tempwadreader.WadFile.Compress();
 			}
 			else 
 			{
@@ -1152,6 +1155,9 @@ namespace CodeImp.DoomBuilder
 				result = false;
 			General.MainWindow.DisplayStatus(oldstatus);
 
+			//mxd. Compress temp file...
+			tempwadreader.WadFile.Compress();
+
 			return result;
 		}
 

Source/Core/IO/WAD.cs

@@ -85,6 +85,17 @@ namespace CodeImp.DoomBuilder.IO
 		
 		#endregion
 
+		#region ================== Structs (mxd)
+
+		private struct LumpCopyData
+		{
+			public byte[] Data;
+			public byte[] FixedName;
+			public int Index;
+		}
+
+		#endregion
+
 		#region ================== Variables
 
 		// File objects
@@ -334,6 +345,66 @@ namespace CodeImp.DoomBuilder.IO
 			}
 		}
 
+		//mxd. This rebuilds the WAD file, removing all "dead" entries
+		// Tech info: WAD.Remove() doesn't remove lump data, so MapManager.TemporaryMapFile slowly gets bigger
+		// with every map save/test, which leads to lumpsoffset overflowing when TemporaryMapFile size reaches 
+		// int.MaxValue bytes in size (that's ~2Gb). 
+		internal void Compress()
+		{
+			// No can't do...
+			if(isreadonly) return;
+			
+			// Gather existing data
+			int totaldatalength = 0;
+			List<LumpCopyData> copydata = new List<LumpCopyData>(lumps.Count);
+			for(int i = 0; i < lumps.Count; i++)
+			{
+				// Copy lump...
+				LumpCopyData lcd = new LumpCopyData();
+				Lump l = lumps[i];
+
+				lcd.FixedName = l.FixedName;
+				lcd.Index = i;
+				lcd.Data = l.Stream.ReadAllBytes();
+
+				// Store data
+				copydata.Add(lcd);
+
+				// Track total length
+				totaldatalength += l.Length;
+
+				// Dispose lump
+				l.Dispose();
+			}
+
+			// Compression required?
+			if(totaldatalength >= lumpsoffset + 12) return;
+
+			// Set new file length
+			file.SetLength(totaldatalength + lumps.Count * 16);
+
+			// Reset lumpsoffset
+			lumpsoffset = 12;
+
+			// Reset lumps collection
+			lumps = new List<Lump>(copydata.Count);
+			numlumps = copydata.Count;
+
+			// Recreate all lumps
+			foreach(LumpCopyData lcd in copydata)
+			{
+				Lump l = new Lump(file, this, lcd.FixedName, lumpsoffset, lcd.Data.Length);
+				l.Stream.Write(lcd.Data, 0, lcd.Data.Length);
+				l.Stream.Seek(0, SeekOrigin.Begin);
+				lumps.Insert(lcd.Index, l);
+
+				lumpsoffset += lcd.Data.Length;
+			}
+
+			// Write new headers
+			WriteHeaders();
+		}
+		
 		// This flushes writing changes
 		/*public void Flush()
 		{
@@ -364,18 +435,9 @@ namespace CodeImp.DoomBuilder.IO
 			Lump lump = new Lump(file, this, Lump.MakeFixedName(name, ENCODING), lumpsoffset, datalength);
 			lumps.Insert(position, lump);
 			
-			//dbg
-			int oldlumpoffset = lumpsoffset;
-			
 			// Advance lumps table offset
 			lumpsoffset += datalength;
 
-			//dbg
-			if(lumpsoffset < 0)
-			{
-				throw new InvalidOperationException("Invalid lumpsoffset (" + lumpsoffset + ") after inserting lump \"" + name + "\" at position " + position + ", datalength=" + datalength + ". Previous lumpoffset was " + oldlumpoffset);
-			}
-
 			// Write the new headers
 			if(writeheaders) WriteHeaders();
 

Source/Plugins/BuilderModes/ClassicModes/DrawGeometryMode.cs

@@ -376,6 +376,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				{
 					//mxd. Line angle must stay the same
 					if(snaptocardinal)
+					{
+						if(points.Count > 0)
 						{
 							Line2D ourline = new Line2D(points[points.Count - 1].pos, vm);
 							Line2D nearestline = new Line2D(nl.Start.Position, nl.End.Position);
@@ -385,7 +387,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 								// Intersection is on nearestline?
 								float u = Line2D.GetNearestOnLine(nearestline.v1, nearestline.v2, intersection);
 
-							if(u < 0f || u > 1f){}
+								if(u < 0f || u > 1f) { }
 								else
 								{
 									p.pos = new Vector2D((float)Math.Round(intersection.x, General.Map.FormatInterface.VertexDecimals),
@@ -394,6 +396,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 								}
 							}
 						}
+					}
 					// Snap to grid?
 					else if(snaptogrid)
 					{