Remove the pointer to the deallocated chunk from the current player/NPC.

This fixes the Great Crash Bug(tm).

.gitignore

@@ -12,3 +12,4 @@ build/
 .idea/
 *.db
 version.h
+infer-out

src/ChunkManager.cpp

@@ -37,30 +37,44 @@ void ChunkManager::addPlayer(int posX, int posY, int instanceID, CNSocket* sock)
     chunk->players.insert(sock);
 }
 
-void ChunkManager::removePlayer(std::tuple<int, int, int> chunkPos, CNSocket* sock) {
+bool ChunkManager::removePlayer(std::tuple<int, int, int> chunkPos, CNSocket* sock) {
     if (!checkChunk(chunkPos))
-        return; // do nothing if chunk doesn't even exist
+        return false; // do nothing if chunk doesn't even exist
 
     Chunk* chunk = chunks[chunkPos];
 
     chunk->players.erase(sock); // gone
 
     // if players and NPCs are empty, free chunk and remove it from surrounding views
-    if (chunk->NPCs.size() == 0 && chunk->players.size() == 0)
+    if (chunk->NPCs.size() == 0 && chunk->players.size() == 0) {
         destroyChunk(chunkPos);
+
+        // the chunk we left was destroyed
+        return true;
+    }
+
+    // the chunk we left was not destroyed
+    return false;
 }
 
-void ChunkManager::removeNPC(std::tuple<int, int, int> chunkPos, int32_t id) {
+bool ChunkManager::removeNPC(std::tuple<int, int, int> chunkPos, int32_t id) {
     if (!checkChunk(chunkPos))
-        return; // do nothing if chunk doesn't even exist
+        return false; // do nothing if chunk doesn't even exist
 
     Chunk* chunk = chunks[chunkPos];
 
     chunk->NPCs.erase(id); // gone
 
     // if players and NPCs are empty, free chunk and remove it from surrounding views
-    if (chunk->NPCs.size() == 0 && chunk->players.size() == 0)
+    if (chunk->NPCs.size() == 0 && chunk->players.size() == 0) {
         destroyChunk(chunkPos);
+
+        // the chunk we left was destroyed
+        return true;
+    }
+
+    // the chunk we left was not destroyed
+    return false;
 }
 
 void ChunkManager::destroyChunk(std::tuple<int, int, int> chunkPos) {

src/ChunkManager.hpp

@@ -28,8 +28,8 @@ namespace ChunkManager {
 
     void addNPC(int posX, int posY, int instanceID, int32_t id);
     void addPlayer(int posX, int posY, int instanceID, CNSocket* sock);
-    void removePlayer(std::tuple<int, int, int> chunkPos, CNSocket* sock);
-    void removeNPC(std::tuple<int, int, int> chunkPos, int32_t id);
+    bool removePlayer(std::tuple<int, int, int> chunkPos, CNSocket* sock);
+    bool removeNPC(std::tuple<int, int, int> chunkPos, int32_t id);
     bool checkChunk(std::tuple<int, int, int> chunk);
     void destroyChunk(std::tuple<int, int, int> chunkPos);
     std::tuple<int, int, int> grabChunk(int posX, int posY, int instanceID);

src/NPCManager.cpp

@@ -162,8 +162,15 @@ void NPCManager::updateNPCPosition(int32_t id, int X, int Y, int Z) {
     // send npc enter to new chunks
     addNPC(ChunkManager::getDeltaChunks(allChunks, npc->currentChunks), id);
 
-    // update chunks
-    ChunkManager::removeNPC(npc->chunkPos, id);
+    Chunk *chunk = nullptr;
+    if (ChunkManager::checkChunk(npc->chunkPos))
+        chunk = ChunkManager::chunks[npc->chunkPos];
+
+    if (ChunkManager::removeNPC(npc->chunkPos, id)) {
+        // if the old chunk was deallocated, remove it
+        allChunks.erase(std::remove(allChunks.begin(), allChunks.end(), chunk), allChunks.end());
+    }
+
     ChunkManager::addNPC(X, Y, npc->instanceID, id);
 
     npc->chunkPos = newPos;

src/PlayerManager.cpp

@@ -85,7 +85,7 @@ void PlayerManager::removePlayer(CNSocket* key) {
     std::cout << players.size() << " players" << std::endl;
 }
 
-void PlayerManager::removePlayerFromChunks(std::vector<Chunk*> chunks, CNSocket* sock) {
+bool PlayerManager::removePlayerFromChunks(std::vector<Chunk*> chunks, CNSocket* sock) {
     INITSTRUCT(sP_FE2CL_PC_EXIT, exitPlayer);
 
     // for chunks that need the player to be removed from
@@ -119,7 +119,7 @@ void PlayerManager::removePlayerFromChunks(std::vector<Chunk*> chunks, CNSocket*
     }
 
     // remove us from that old stinky chunk
-    ChunkManager::removePlayer(players[sock].chunkPos, sock);
+    return ChunkManager::removePlayer(players[sock].chunkPos, sock);
 }
 
 void PlayerManager::addPlayerToChunks(std::vector<Chunk*> chunks, CNSocket* sock) {
@@ -205,8 +205,14 @@ void PlayerManager::updatePlayerChunk(CNSocket* sock, int X, int Y) {
     // add player to chunk
     std::vector<Chunk*> allChunks = ChunkManager::grabChunks(newPos);
 
+    Chunk *chunk = nullptr;
+    if (ChunkManager::checkChunk(view.chunkPos))
+        chunk = ChunkManager::chunks[view.chunkPos];
+
     // first, remove all the old npcs & players from the old chunks
-    removePlayerFromChunks(ChunkManager::getDeltaChunks(view.currentChunks, allChunks), sock);
+    if (removePlayerFromChunks(ChunkManager::getDeltaChunks(view.currentChunks, allChunks), sock)) {
+        allChunks.erase(std::remove(allChunks.begin(), allChunks.end(), chunk), allChunks.end());
+    }
 
     // now, add all the new npcs & players!
     addPlayerToChunks(ChunkManager::getDeltaChunks(allChunks, view.currentChunks), sock);

src/PlayerManager.hpp

@@ -27,7 +27,7 @@ namespace PlayerManager {
     void addPlayer(CNSocket* key, Player plr);
     void removePlayer(CNSocket* key);
 
-    void removePlayerFromChunks(std::vector<Chunk*> chunks, CNSocket* sock);
+    bool removePlayerFromChunks(std::vector<Chunk*> chunks, CNSocket* sock);
     void addPlayerToChunks(std::vector<Chunk*> chunks, CNSocket* sock);
 
     void updatePlayerPosition(CNSocket* sock, int X, int Y, int Z);