- Changed: When the screen is being deleted the 'screen' variable should be

set to NULL before performing the delete. Otherwise, in some abnormal
  situations, it could happen that the destroyed screen object is still
  being accessed.
- Fixed: V_Shutdown didn't set OF_YesReallyDelete before deleting screen.


SVN r870 (trunk)

docs/rh-log.txt

@@ -1,4 +1,9 @@
 March 30, 2008 (Changes by Graf Zahl)
+- Changed: When the screen is being deleted the 'screen' variable should be
+  set to NULL before performing the delete. Otherwise, in some abnormal
+  situations, it could happen that the destroyed screen object is still
+  being accessed.
+- Fixed: V_Shutdown didn't set OF_YesReallyDelete before deleting screen.
 - Fixed: The HIRESTEX parser didn't check if a graphic specified in a remap
   command actually existed.
 - Fixed: My $Limit fix from yesterday didn't work because NearLimit was

src/sdl/hardware.cpp

@@ -53,9 +53,10 @@ void I_ShutdownGraphics ()
 {
 	if (screen)
 	{
-		screen->ObjectFlags |= OF_YesReallyDelete;
-		delete screen;
+		DFrameBuffer *s = screen;
 		screen = NULL;
+		s->ObjectFlags |= OF_YesReallyDelete;
+		delete s;
 	}
 	if (Video)
 		delete Video, Video = NULL;

src/v_video.cpp

@@ -1642,9 +1642,12 @@ void V_Init2()
 	float gamma = static_cast<DDummyFrameBuffer *>(screen)->Gamma;
 	FFont *font = screen->Font;
 
-	screen->ObjectFlags |= OF_YesReallyDelete;
-	delete screen;
-	screen = NULL;
+	{
+		DFrameBuffer *s = screen;
+		screen = NULL;
+		s->ObjectFlags |= OF_YesReallyDelete;
+		delete s;
+	}
 
 	I_InitGraphics();
 	I_ClosestResolution (&width, &height, 8);
@@ -1665,10 +1668,12 @@ void V_Init2()
 
 void V_Shutdown()
 {
-	if (screen != NULL)
+	if (screen)
 	{
-		delete screen;
+		DFrameBuffer *s = screen;
 		screen = NULL;
+		s->ObjectFlags |= OF_YesReallyDelete;
+		delete s;
 	}
 	while (FFont::FirstFont != NULL)
 	{

src/win32/hardware.cpp

@@ -62,9 +62,10 @@ void I_ShutdownGraphics ()
 {
 	if (screen)
 	{
-		screen->ObjectFlags |= OF_YesReallyDelete;
-		delete screen;
+		DFrameBuffer *s = screen;
 		screen = NULL;
+		s->ObjectFlags |= OF_YesReallyDelete;
+		delete s;
 	}
 	if (Video)
 		delete Video, Video = NULL;