General tidy of mobj_t pointers on player_t struct

- CL_ClearPlayer
    - Delete followmobj, stumbleIndicator, and sliptideZipIndicator
    - Wipe flickyAttacker and powerup.flickyController
- G_PlayerReborn
    - Properly destroy the Follower and its bubble overlays, etc
    - Ensure ringShooter pointer is kept
    - Delete followmobj, stumbleIndicator, and sliptideZipIndicator
    - Wipe flickyAttacker and powerup.flickyController
- P_PlayerThink
    - Ensure all invalid pointers are erased, even on hitlag frames

src/d_clisrv.c

@@ -2775,20 +2775,36 @@ void CL_ClearPlayer(INT32 playernum)
 			K_RemoveFollower(&players[playernum]);
 		}
 
-		if (players[playernum].mo)
-		{
-			P_RemoveMobj(players[playernum].mo);
-			P_SetTarget(&players[playernum].mo, NULL);
+#define PlayerPointerRemove(field) \
+		if (field) \
+		{ \
+			P_RemoveMobj(field); \
+			P_SetTarget(&field, NULL); \
 		}
 
+		// These are mostly subservient to the player, and may not clean themselves up.
+		PlayerPointerRemove(players[playernum].mo);
+		PlayerPointerRemove(players[playernum].followmobj);
+		PlayerPointerRemove(players[playernum].stumbleIndicator);
+		PlayerPointerRemove(players[playernum].sliptideZipIndicator);
+
+#undef PlayerPointerRemove
+
+		// These have thinkers of their own.
+		P_SetTarget(&players[playernum].whip, NULL);
+		P_SetTarget(&players[playernum].hand, NULL);
+		P_SetTarget(&players[playernum].hoverhyudoro, NULL);
+		P_SetTarget(&players[playernum].ringShooter, NULL);
+
+		// TODO: Any better handling in store?
+		P_SetTarget(&players[playernum].flickyAttacker, NULL);
+		P_SetTarget(&players[playernum].powerup.flickyController, NULL);
+
+		// These are camera items and possibly belong to multiple players.
 		P_SetTarget(&players[playernum].skybox.viewpoint, NULL);
 		P_SetTarget(&players[playernum].skybox.centerpoint, NULL);
 		P_SetTarget(&players[playernum].awayview.mobj, NULL);
-		P_SetTarget(&players[playernum].followmobj, NULL);
-		P_SetTarget(&players[playernum].hoverhyudoro, NULL);
-		P_SetTarget(&players[playernum].stumbleIndicator, NULL);
-		P_SetTarget(&players[playernum].sliptideZipIndicator, NULL);
-		P_SetTarget(&players[playernum].ringShooter, NULL);
+		
 	}
 
 	// Handle parties.

src/g_game.c

@@ -2455,10 +2455,8 @@ void G_PlayerReborn(INT32 player, boolean betweenmaps)
 	INT32 followerskin;
 	UINT16 followercolor;
 
-	mobj_t *follower; // old follower, will probably be removed by the time we're dead but you never know.
-	mobj_t *hoverhyudoro;
-	mobj_t *skyboxviewpoint;
-	mobj_t *skyboxcenterpoint;
+	mobj_t *ringShooter, *hoverhyudoro;
+	mobj_t *skyboxviewpoint, *skyboxcenterpoint;
 
 	INT32 charflags;
 	UINT32 followitem;
@@ -2677,22 +2675,40 @@ void G_PlayerReborn(INT32 player, boolean betweenmaps)
 
 	if (!betweenmaps)
 	{
-		follower = players[player].follower;
-		P_SetTarget(&players[player].follower, NULL);
-		P_SetTarget(&players[player].awayview.mobj, NULL);
-		P_SetTarget(&players[player].stumbleIndicator, NULL);
+		K_RemoveFollower(&players[player]);
+
+#define PlayerPointerRemove(field) \
+		if (field) \
+		{ \
+			P_RemoveMobj(field); \
+			P_SetTarget(&field, NULL); \
+		}
+
+		// These are mostly subservient to the player, and may not clean themselves up.
+		PlayerPointerRemove(players[player].followmobj);
+		PlayerPointerRemove(players[player].stumbleIndicator);
+		PlayerPointerRemove(players[player].sliptideZipIndicator);
+
+#undef PlayerPointerRemove
+
+		// These will erase themselves.
 		P_SetTarget(&players[player].whip, NULL);
 		P_SetTarget(&players[player].hand, NULL);
-		P_SetTarget(&players[player].ringShooter, NULL);
-		P_SetTarget(&players[player].followmobj, NULL);
 
+		// TODO: Any better handling in store?
+		P_SetTarget(&players[player].awayview.mobj, NULL);
+		P_SetTarget(&players[player].flickyAttacker, NULL);
+		P_SetTarget(&players[player].powerup.flickyController, NULL);
+
+		// The following pointers are safe to set directly, because the end goal should be refcount consistency before and after remanifestation.
+		ringShooter = players[player].ringShooter;
 		hoverhyudoro = players[player].hoverhyudoro;
 		skyboxviewpoint = players[player].skybox.viewpoint;
 		skyboxcenterpoint = players[player].skybox.centerpoint;
 	}
 	else
 	{
-		follower = hoverhyudoro = NULL;
+		ringShooter = hoverhyudoro = NULL;
 		skyboxviewpoint = skyboxcenterpoint = NULL;
 	}
 
@@ -2769,9 +2785,8 @@ void G_PlayerReborn(INT32 player, boolean betweenmaps)
 	if (saveroundconditions)
 		memcpy(&p->roundconditions, &roundconditions, sizeof (p->roundconditions));
 
-	if (follower)
-		P_RemoveMobj(follower);
-
+	// See above comment about refcount consistency.
+	p->ringShooter = ringShooter;
 	p->hoverhyudoro = hoverhyudoro;
 	p->skybox.viewpoint = skyboxviewpoint;
 	p->skybox.centerpoint = skyboxcenterpoint;

src/k_kart.c

@@ -8065,9 +8065,6 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 
 	if (player->guardCooldown)
 		player->guardCooldown--;
-		
-	if (player->whip && P_MobjWasRemoved(player->whip))
-		P_SetTarget(&player->whip, NULL);
 
 	if (player->startboost > 0 && onground == true)
 	{
@@ -8326,15 +8323,6 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 		player->tripwireState = TRIPSTATE_NONE;
 	}
 
-	if (player->hand && P_MobjWasRemoved(player->hand))
-		P_SetTarget(&player->hand, NULL);
-
-	if (player->flickyAttacker && P_MobjWasRemoved(player->flickyAttacker))
-		P_SetTarget(&player->flickyAttacker, NULL);
-
-	if (player->powerup.flickyController && P_MobjWasRemoved(player->powerup.flickyController))
-		P_SetTarget(&player->powerup.flickyController, NULL);
-
 	if (player->spectator == false)
 	{
 		K_KartEbrakeVisuals(player);

src/p_user.c

@@ -4249,6 +4249,25 @@ void P_PlayerThink(player_t *player)
 		player->playerstate = PST_DEAD;
 	}
 
+	// Erasing invalid player pointers
+	{
+#define PlayerPointerErase(field) \
+		if (field && P_MobjWasRemoved(field)) \
+			P_SetTarget(&field, NULL); \
+
+		PlayerPointerErase(player->followmobj);
+		PlayerPointerErase(player->stumbleIndicator);
+		PlayerPointerErase(player->sliptideZipIndicator);
+		PlayerPointerErase(player->whip);
+		PlayerPointerErase(player->hand);
+		PlayerPointerErase(player->ringShooter);
+		PlayerPointerErase(player->hoverhyudoro);
+		PlayerPointerErase(player->flickyAttacker);
+		PlayerPointerErase(player->powerup.flickyController);
+
+#undef PlayerPointerErase
+	}
+
 	player->old_drawangle = player->drawangle;
 
 	P_TickAltView(&player->awayview);