- removed all asserts from the interpolation objects' Destroy methods. The condition will not be true after a failed savegame write occured.

- fixed: D_ErrorCleanup must clear 'savegamerestore'.
- fixed: Cleaning up when loading a savegame failed while restoring the thinker list did not work. There were two issues:
  * removed the asserts in GC::SweepList because they get triggered by thinkers that were not fully initialized during loading.
  * AActor::UnlinkFromWorld may not assume that the sector list has been initialized when this function is called. 

SVN r3274 (trunk)

src/d_main.cpp

@@ -912,6 +912,7 @@ void D_Display ()
 
 void D_ErrorCleanup ()
 {
+	savegamerestore = false;
 	screen->Unlock ();
 	bglobal.RemoveAllBots (true);
 	D_QuitNetGame ();

src/dobjgc.cpp

@@ -242,8 +242,10 @@ static DObject **SweepList(DObject **p, size_t count, size_t *finalize_count)
 				// be in a thinker list, then I need to add write barriers for every time a
 				// thinker pointer is changed. This seems easier and perfectly reasonable, since
 				// a live thinker that isn't on a thinker list isn't much of a thinker.
-				assert(!curr->IsKindOf(RUNTIME_CLASS(DThinker)) || (curr->ObjectFlags & OF_Sentinel));
-				assert(!curr->IsKindOf(RUNTIME_CLASS(DInterpolation)));
+
+				// However, this can happen during deletion of the thinker list while cleaning up
+				// from a savegame error so we can't assume that any thinker that gets here is an error.
+
 				curr->Destroy();
 			}
 			curr->ObjectFlags |= OF_Cleanup;

src/dthinker.cpp

@@ -192,19 +192,10 @@ void DThinker::SerializeAll(FArchive &arc, bool hubLoad)
 				statcount--;
 			}
 		}
-		catch (class CDoomError &err)
+		catch (class CDoomError &)
 		{
 			bSerialOverride = false;
-
-			// DestroyAllThinkers cannot be called here. It will try to delete the corrupted
-			// object table left behind by the serializer and crash.
-			// Trying to continue is not an option here because the garbage collector will 
-			// crash the next time it runs.
-			// Even making this a fatal error will crash but at least the message can be seen
-			// before the crash - which is not the case with all other options.
-
-			//DestroyAllThinkers();
-			I_FatalError("%s", err.GetMessage());
+			DestroyAllThinkers();
 			throw;
 		}
 		bSerialOverride = false;

src/p_maputl.cpp

@@ -246,6 +246,9 @@ void AActor::UnlinkFromWorld ()
 		// pointers, allows head node pointers to be treated like everything else
 		AActor **prev = sprev;
 		AActor  *next = snext;
+
+		if (prev != NULL)	// prev will be NULL if this actor gets deleted due to cleaning up from a broken savegame
+		{
 			if ((*prev = next))  // unlink from sector list
 				next->sprev = prev;
 			snext = NULL;
@@ -267,6 +270,7 @@ void AActor::UnlinkFromWorld ()
 			sector_list = touching_sectorlist;
 			touching_sectorlist = NULL; //to be restored by P_SetThingPosition
 		}
+	}
 		
 	if (!(flags & MF_NOBLOCKMAP))
 	{

src/r_data/r_interpolate.cpp

@@ -406,12 +406,10 @@ void DSectorPlaneInterpolation::Destroy()
 {
 	if (ceiling) 
 	{
-		assert(sector->interpolations[sector_t::CeilingMove] == this);
 		sector->interpolations[sector_t::CeilingMove] = NULL;
 	}
 	else 
 	{
-		assert(sector->interpolations[sector_t::FloorMove] == this);
 		sector->interpolations[sector_t::FloorMove] = NULL;
 	}
 
@@ -570,12 +568,10 @@ void DSectorScrollInterpolation::Destroy()
 {
 	if (ceiling) 
 	{
-		assert(sector->interpolations[sector_t::CeilingScroll] == this);
 		sector->interpolations[sector_t::CeilingScroll] = NULL;
 	}
 	else 
 	{
-		assert(sector->interpolations[sector_t::FloorScroll] == this);
 		sector->interpolations[sector_t::FloorScroll] = NULL;
 	}
 	Super::Destroy();
@@ -661,7 +657,6 @@ DWallScrollInterpolation::DWallScrollInterpolation(side_t *_side, int _part)
 
 void DWallScrollInterpolation::Destroy()
 {
-	assert(side->textures[part].interpolation == this);
 	side->textures[part].interpolation = NULL;
 	Super::Destroy();
 }
@@ -746,7 +741,6 @@ DPolyobjInterpolation::DPolyobjInterpolation(FPolyObj *po)
 
 void DPolyobjInterpolation::Destroy()
 {
-	assert(poly->interpolation == this);
 	poly->interpolation = NULL;
 	Super::Destroy();
 }