fix crash

Scenes/OpenMap.gd

@@ -208,8 +208,10 @@ func continue_load(map):
 	oScriptHelpers.start()
 
 	# update_editor_data
-	if Slabset.dat.empty() == true: Slabset.load_default_slabset()
-	if Columnset.cubes.empty() == true: Columnset.load_default_columnset()
+	if Slabset.dat.empty() == true:
+		Slabset.load_default_slabset()
+	if Columnset.cubes.empty() == true:
+		Columnset.load_default_columnset()
 
 	oOverheadGraphics.update_full_overhead_map()
 
@@ -222,14 +224,6 @@ func continue_load(map):
 
 	oMenu.add_recent(map)
 
-	# When opening a map, be sure that column 0 is empty. Otherwise apply a fix.
-	if oDataClm.permanent[0] != 0 or oDataClm.cubes[0] != [0,0,0,0, 0,0,0,0]:
-		# Make column 0 empty while preserving the column that was there.
-		oDataClm.sort_columns_by_utilized()
-		oDataClm.delete_column(0)
-		oEditor.mapHasBeenEdited = true
-		oMessage.quick("Fixed column index 0, re-save your map.")
-
 	oDataClm.store_default_data()
 
 
@@ -259,6 +253,14 @@ func continue_load_openmap(map):
 	else:
 		oMessage.quick('Opened map')
 
+	# When opening a map, be sure that column 0 is empty. Otherwise apply a fix.
+	if oDataClm.permanent[0] != 0 or oDataClm.cubes[0] != [0,0,0,0, 0,0,0,0]:
+		# Make column 0 empty while preserving the column that was there.
+		oDataClm.sort_columns_by_utilized()
+		oDataClm.delete_column(0)
+		oEditor.mapHasBeenEdited = true
+		oMessage.quick("Fixed column index 0, re-save your map.")
+
 
 func _on_ConfirmDecompression_confirmed():
 	print('Attempting to decompress...')

Scenes/OverheadGraphics.gd

@@ -8,6 +8,8 @@ onready var oTextureCache = Nodelist.list["oTextureCache"]
 onready var oDataLevelStyle = Nodelist.list["oDataLevelStyle"]
 onready var oUndoStates = Nodelist.list["oUndoStates"]
 onready var oQuickMapPreviewDisplay = Nodelist.list["oQuickMapPreviewDisplay"]
+onready var oMessage = Nodelist.list["oMessage"]
+
 
 signal graphics_thread_completed
 
@@ -92,10 +94,12 @@ func multi_threaded():
 		print("graphics multi_threaded end")
 
 func thread_done(resulting_pixel_data):
-	pixel_data = resulting_pixel_data
-	overheadImgData.create_from_data(M.xSize * 3, M.ySize * 3, false, Image.FORMAT_RGB8, pixel_data)
-
-	overheadTexData.create_from_image(overheadImgData, 0)
+	if resulting_pixel_data != null:
+		pixel_data = resulting_pixel_data
+		overheadImgData.create_from_data(M.xSize * 3, M.ySize * 3, false, Image.FORMAT_RGB8, pixel_data)
+		overheadTexData.create_from_image(overheadImgData, 0)
+	else:
+		oMessage.quick("thread crashed")
 
 	thread_currently_processing = false
 	emit_signal("graphics_thread_completed")