11 files changed, 219 insertions, 80 deletions

diff --git a/src/BlockID.h b/src/BlockID.h
index b31c589b9..f53440ec8 100644
--- a/src/BlockID.h
+++ b/src/BlockID.h
@@ -801,6 +801,7 @@ enum eDamageType
 	dtPotionOfHarming,
 	dtEnderPearl,       // Thrown an ender pearl, teleported by it
 	dtAdmin,            // Damage applied by an admin command
+	dtExplosion,        // Damage applied by an explosion
 	
 	// Some common synonyms:
 	dtPawnAttack   = dtAttack,
diff --git a/src/ChunkDef.h b/src/ChunkDef.h
index 09bd766da..1c4aa6aca 100644
--- a/src/ChunkDef.h
+++ b/src/ChunkDef.h
@@ -497,7 +497,7 @@ public:
 
 
 
-/// Generic template that can store any kind of data together with a triplet of 3 coords:
+/** Generic template that can store any kind of data together with a triplet of 3 coords*/
 template <typename X> class cCoordWithData
 {
 public:
@@ -517,12 +517,40 @@ public:
 	}
 } ;
 
-// Illegal in C++03: typedef std::list< cCoordWithData<X> > cCoordWithDataList<X>;
 typedef cCoordWithData<int>        cCoordWithInt;
 typedef cCoordWithData<BLOCKTYPE>  cCoordWithBlock;
+
 typedef std::list<cCoordWithInt>   cCoordWithIntList;
 typedef std::vector<cCoordWithInt> cCoordWithIntVector;
-typedef std::vector<cCoordWithBlock> cCoordWithBlockVector;
+
+
+
+
+
+/** Generic template that can store two types of any kind of data together with a triplet of 3 coords */
+template <typename X, typename Z> class cCoordWithDoubleData
+{
+public:
+	int x;
+	int y;
+	int z;
+	X   Data;
+	Z   DataTwo;
+
+	cCoordWithDoubleData(int a_X, int a_Y, int a_Z) :
+		x(a_X), y(a_Y), z(a_Z)
+	{
+	}
+
+	cCoordWithDoubleData(int a_X, int a_Y, int a_Z, const X & a_Data, const Z & a_DataTwo) :
+		x(a_X), y(a_Y), z(a_Z), Data(a_Data), DataTwo(a_DataTwo)
+	{
+	}
+};
+
+typedef cCoordWithDoubleData <BLOCKTYPE, bool> cCoordWithBlockAndBool;
+
+typedef std::vector<cCoordWithBlockAndBool> cCoordWithBlockAndBoolVector;
 
 
 
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 049bb5fb2..1e2181f32 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -15,6 +15,9 @@
 #include "Blocks/BlockHandler.h"
 #include "MobCensus.h"
 #include "MobSpawner.h"
+#include "BoundingBox.h"
+
+#include "Entities/Pickup.h"
 
 #ifndef _WIN32
 	#include <cstdlib> // abs
@@ -1657,49 +1660,52 @@ void cChunkMap::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_
 	{
 		return;
 	}
-	
+
+	bool ShouldDestroyBlocks = true;
+
 	// Don't explode if the explosion center is inside a liquid block:
-	switch (m_World->GetBlock((int)floor(a_BlockX), (int)floor(a_BlockY), (int)floor(a_BlockZ)))
+	if (IsBlockLiquid(m_World->GetBlock((int)floor(a_BlockX), (int)floor(a_BlockY), (int)floor(a_BlockZ))))
 	{
-		case E_BLOCK_WATER:
-		case E_BLOCK_STATIONARY_WATER:
-		case E_BLOCK_LAVA:
-		case E_BLOCK_STATIONARY_LAVA:
-		{
-			return;
-		}
+		ShouldDestroyBlocks = false;
 	}
-	
-	cBlockArea area;
+
+	int ExplosionSizeInt = (int)ceil(a_ExplosionSize);
+	int ExplosionSizeSq = ExplosionSizeInt * ExplosionSizeInt;
+
 	int bx = (int)floor(a_BlockX);
 	int by = (int)floor(a_BlockY);
 	int bz = (int)floor(a_BlockZ);
-	int ExplosionSizeInt = (int) ceil(a_ExplosionSize);
-	int ExplosionSizeSq =  ExplosionSizeInt * ExplosionSizeInt;
-	a_BlocksAffected.reserve(8 * ExplosionSizeInt * ExplosionSizeInt * ExplosionSizeInt);
+
 	int MinY = std::max((int)floor(a_BlockY - ExplosionSizeInt), 0);
 	int MaxY = std::min((int)ceil(a_BlockY + ExplosionSizeInt), cChunkDef::Height - 1);
-	area.Read(m_World, bx - ExplosionSizeInt, (int)ceil(a_BlockX + ExplosionSizeInt), MinY, MaxY, bz - ExplosionSizeInt, (int)ceil(a_BlockZ + ExplosionSizeInt));
-	for (int x = -ExplosionSizeInt; x < ExplosionSizeInt; x++)
+
+	if (ShouldDestroyBlocks)
 	{
-		for (int y = -ExplosionSizeInt; y < ExplosionSizeInt; y++)
+		cBlockArea area;
+
+		a_BlocksAffected.reserve(8 * ExplosionSizeInt * ExplosionSizeInt * ExplosionSizeInt);
+
+		area.Read(m_World, bx - ExplosionSizeInt, (int)ceil(a_BlockX + ExplosionSizeInt), MinY, MaxY, bz - ExplosionSizeInt, (int)ceil(a_BlockZ + ExplosionSizeInt));
+		for (int x = -ExplosionSizeInt; x < ExplosionSizeInt; x++)
 		{
-			if ((by + y >= cChunkDef::Height) || (by + y < 0))
+			for (int y = -ExplosionSizeInt; y < ExplosionSizeInt; y++)
 			{
-				// Outside of the world
-				continue;
-			}
-			for (int z = -ExplosionSizeInt; z < ExplosionSizeInt; z++)
-			{
-				if ((x * x + y * y + z * z) > ExplosionSizeSq)
+				if ((by + y >= cChunkDef::Height) || (by + y < 0))
 				{
-					// Too far away
+					// Outside of the world
 					continue;
 				}
-
-				BLOCKTYPE Block = area.GetBlockType(bx + x, by + y, bz + z);
-				switch (Block)
+				for (int z = -ExplosionSizeInt; z < ExplosionSizeInt; z++)
 				{
+					if ((x * x + y * y + z * z) > ExplosionSizeSq)
+					{
+						// Too far away
+						continue;
+					}
+
+					BLOCKTYPE Block = area.GetBlockType(bx + x, by + y, bz + z);
+					switch (Block)
+					{
 					case E_BLOCK_TNT:
 					{
 						// Activate the TNT, with a random fuse between 10 to 30 game ticks
@@ -1724,20 +1730,20 @@ void cChunkMap::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_
 						area.SetBlockType(bx + x, by + y, bz + z, E_BLOCK_WATER);
 						break;
 					}
-					
+
 					case E_BLOCK_STATIONARY_LAVA:
 					{
 						// Turn into simulated lava:
 						area.SetBlockType(bx + x, by + y, bz + z, E_BLOCK_LAVA);
 						break;
 					}
-					
+
 					case E_BLOCK_AIR:
 					{
 						// No pickups for air
 						break;
 					}
-					
+
 					default:
 					{
 						if (m_World->GetTickRandomNumber(100) <= 25) // 25% chance of pickups
@@ -1751,11 +1757,90 @@ void cChunkMap::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_
 						area.SetBlockType(bx + x, by + y, bz + z, E_BLOCK_AIR);
 						a_BlocksAffected.push_back(Vector3i(bx + x, by + y, bz + z));
 					}
-				}  // switch (BlockType)
-			}  // for z
-		}  // for y
-	}  // for x
-	area.Write(m_World, bx - ExplosionSizeInt, MinY, bz - ExplosionSizeInt);
+					}  // switch (BlockType)
+				}  // for z
+			}  // for y
+		}  // for x
+		area.Write(m_World, bx - ExplosionSizeInt, MinY, bz - ExplosionSizeInt);
+	}
+
+	class cTNTDamageCallback :
+		public cEntityCallback
+	{
+	public:
+		cTNTDamageCallback(cBoundingBox & a_bbTNT, Vector3d a_ExplosionPos, int a_ExplosionSize, int a_ExplosionSizeSq) :
+			m_bbTNT(a_bbTNT),
+			m_ExplosionPos(a_ExplosionPos),
+			m_ExplosionSize(a_ExplosionSize),
+			m_ExplosionSizeSq(a_ExplosionSizeSq)
+		{
+		}
+
+		virtual bool Item(cEntity * a_Entity) override
+		{
+			if (a_Entity->IsPickup())
+			{
+				if (((cPickup *)a_Entity)->GetAge() < 20) // If pickup age is smaller than one second, it is invincible (so we don't kill pickups that were just spawned)
+				{
+					return false;
+				}
+			}
+
+			Vector3d EntityPos = a_Entity->GetPosition();
+			cBoundingBox bbEntity(EntityPos, a_Entity->GetWidth() / 2, a_Entity->GetHeight());
+
+			if (!m_bbTNT.IsInside(bbEntity)) // IsInside actually acts like DoesSurround
+			{
+				return false;
+			}
+			
+			Vector3d AbsoluteEntityPos(abs(EntityPos.x), abs(EntityPos.y), abs(EntityPos.z));
+			Vector3d MaxExplosionBoundary(m_ExplosionSizeSq, m_ExplosionSizeSq, m_ExplosionSizeSq);
+
+			// Work out how far we are from the edge of the TNT's explosive effect
+			AbsoluteEntityPos -= m_ExplosionPos;
+			AbsoluteEntityPos = MaxExplosionBoundary - AbsoluteEntityPos;
+
+			double FinalDamage = ((AbsoluteEntityPos.x + AbsoluteEntityPos.y + AbsoluteEntityPos.z) / 3) * m_ExplosionSize;
+			FinalDamage = a_Entity->GetMaxHealth() - abs(FinalDamage);
+
+			// Clip damage values
+			if (FinalDamage > a_Entity->GetMaxHealth())
+				FinalDamage = a_Entity->GetMaxHealth();
+			else if (FinalDamage < 0)
+				return false;
+
+			if (!a_Entity->IsTNT()) // Don't apply damage to other TNT entities, they should be invincible
+			{
+				a_Entity->TakeDamage(dtExplosion, NULL, (int)FinalDamage, 0);
+			}
+
+			// Apply force to entities around the explosion - code modified from World.cpp DoExplosionAt()
+			Vector3d distance_explosion = a_Entity->GetPosition() - m_ExplosionPos;
+			if (distance_explosion.SqrLength() < 4096.0)
+			{
+				distance_explosion.Normalize();
+				distance_explosion *= m_ExplosionSizeSq;
+
+				a_Entity->AddSpeed(distance_explosion);
+			}
+			
+			return false;
+		}
+
+	protected:
+		cBoundingBox & m_bbTNT;
+		Vector3d m_ExplosionPos;
+		int m_ExplosionSize;
+		int m_ExplosionSizeSq;
+	};
+
+	cBoundingBox bbTNT(Vector3d(a_BlockX, a_BlockY, a_BlockZ), 0.5, 1);
+	bbTNT.Expand(ExplosionSizeInt * 2, ExplosionSizeInt * 2, ExplosionSizeInt * 2);
+
+
+	cTNTDamageCallback TNTDamageCallback(bbTNT, Vector3d(a_BlockX, a_BlockY, a_BlockZ), a_ExplosionSize, ExplosionSizeSq);
+	ForEachEntity(TNTDamageCallback);
 
 	// Wake up all simulators for the area, so that water and lava flows and sand falls into the blasted holes (FS #391):
 	WakeUpSimulatorsInArea(
diff --git a/src/Defines.h b/src/Defines.h
index 3a26f4be6..5b868b2e5 100644
--- a/src/Defines.h
+++ b/src/Defines.h
@@ -263,6 +263,15 @@ inline bool IsBlockWater(BLOCKTYPE a_BlockType)
 
 
 
+inline bool IsBlockWaterOrIce(BLOCKTYPE a_BlockType)
+{
+	return (IsBlockWater(a_BlockType) || (a_BlockType == E_BLOCK_ICE));
+}
+
+
+
+
+
 inline bool IsBlockLava(BLOCKTYPE a_BlockType)
 {
 	return ((a_BlockType == E_BLOCK_LAVA) || (a_BlockType == E_BLOCK_STATIONARY_LAVA));
diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index e22f689d9..08780ca8b 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -397,6 +397,7 @@ int cEntity::GetArmorCoverAgainst(const cEntity * a_Attacker, eDamageType a_Dama
 		case dtPotionOfHarming:
 		case dtFalling:
 		case dtLightning:
+		case dtPlugin:
 		{
 			return 0;
 		}
@@ -473,7 +474,7 @@ void cEntity::KilledBy(cEntity * a_Killer)
 		return;
 	}
 
-	// Drop loot:	
+	// Drop loot:
 	cItems Drops;
 	GetDrops(Drops, a_Killer);
 	m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ());
diff --git a/src/Entities/Player.cpp b/src/Entities/Player.cpp
index a1c942c20..d649cacf2 100644
--- a/src/Entities/Player.cpp
+++ b/src/Entities/Player.cpp
@@ -792,11 +792,11 @@ void cPlayer::SetFlying(bool a_IsFlying)
 
 void cPlayer::DoTakeDamage(TakeDamageInfo & a_TDI)
 {
-	if (a_TDI.DamageType != dtInVoid)
+	if ((a_TDI.DamageType != dtInVoid) && (a_TDI.DamageType != dtPlugin))
 	{
 		if (IsGameModeCreative())
 		{
-			// No damage / health in creative mode if not void damage
+			// No damage / health in creative mode if not void or plugin damage
 			return;
 		}
 	}
diff --git a/src/GroupManager.cpp b/src/GroupManager.cpp
index 497f98c93..d5567d91e 100644
--- a/src/GroupManager.cpp
+++ b/src/GroupManager.cpp
@@ -69,47 +69,51 @@ cGroupManager::cGroupManager()
 	}
 
 	unsigned int NumKeys = IniFile.GetNumKeys();
-	for( unsigned int i = 0; i < NumKeys; i++ )
+	for (size_t i = 0; i < NumKeys; i++)
 	{
 		std::string KeyName = IniFile.GetKeyName( i );
 		cGroup* Group = GetGroup( KeyName.c_str() );
 
 		LOGD("Loading group: %s", KeyName.c_str() );
 
-		Group->SetName( KeyName );
-		char Color = IniFile.GetValue( KeyName, "Color", "-" )[0];
-		if( Color != '-' )
-			Group->SetColor( cChatColor::Color + Color );
+		Group->SetName(KeyName);
+		AString Color = IniFile.GetValue(KeyName, "Color", "-");
+		if ((Color != "-") && (Color.length() >= 1))
+		{
+			Group->SetColor(cChatColor::Color + Color[0]);
+		}
 		else
-			Group->SetColor( cChatColor::White );
+		{
+			Group->SetColor(cChatColor::White);
+		}
 
-		AString Commands = IniFile.GetValue( KeyName, "Commands", "" );
-		if( Commands.size() > 0 )
+		AString Commands = IniFile.GetValue(KeyName, "Commands", "");
+		if (!Commands.empty())
 		{
-			AStringVector Split = StringSplit( Commands, "," );
-			for( unsigned int i = 0; i < Split.size(); i++)
+			AStringVector Split = StringSplitAndTrim(Commands, ",");
+			for (size_t i = 0; i < Split.size(); i++)
 			{
-				Group->AddCommand( Split[i] );
+				Group->AddCommand(Split[i]);
 			}
 		}
 
-		AString Permissions = IniFile.GetValue( KeyName, "Permissions", "" );
-		if( Permissions.size() > 0 )
+		AString Permissions = IniFile.GetValue(KeyName, "Permissions", "");
+		if (!Permissions.empty())
 		{
-			AStringVector Split = StringSplit( Permissions, "," );
-			for( unsigned int i = 0; i < Split.size(); i++)
+			AStringVector Split = StringSplitAndTrim(Permissions, ",");
+			for (size_t i = 0; i < Split.size(); i++)
 			{
-				Group->AddPermission( Split[i] );
+				Group->AddPermission(Split[i]);
 			}
 		}
 
-		std::string Groups = IniFile.GetValue( KeyName, "Inherits", "" );
-		if( Groups.size() > 0 )
+		std::string Groups = IniFile.GetValue(KeyName, "Inherits", "");
+		if (!Groups.empty())
 		{
-			AStringVector Split = StringSplit( Groups, "," );
-			for( unsigned int i = 0; i < Split.size(); i++)
+			AStringVector Split = StringSplitAndTrim(Groups, ",");
+			for (size_t i = 0; i < Split.size(); i++)
 			{
-				Group->InheritFrom( GetGroup( Split[i].c_str() ) );
+				Group->InheritFrom(GetGroup(Split[i].c_str()));
 			}
 		}
 	}
diff --git a/src/OSSupport/SocketThreads.cpp b/src/OSSupport/SocketThreads.cpp
index 3e2631733..a02661d2c 100644
--- a/src/OSSupport/SocketThreads.cpp
+++ b/src/OSSupport/SocketThreads.cpp
@@ -209,6 +209,10 @@ bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
 		if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
 		{
 			// The remote has already closed the socket, remove the slot altogether:
+			if (m_Slots[i].m_Socket.IsValid())
+			{
+				m_Slots[i].m_Socket.CloseSocket();
+			}
 			m_Slots[i] = m_Slots[--m_NumSlots];
 		}
 		else
@@ -489,6 +493,7 @@ void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
 						// Notify the callback that the remote has closed the socket; keep the slot
 						m_Slots[i].m_Client->SocketClosed();
 						m_Slots[i].m_State = sSlot::ssRemoteClosed;
+						m_Slots[i].m_Socket.CloseSocket();
 						break;
 					}
 					case sSlot::ssWritingRestOut:
@@ -557,6 +562,11 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
 			}
 		}  // if (outgoing data is empty)
 		
+		if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
+		{
+			continue;
+		}
+		
 		if (!SendDataThroughSocket(m_Slots[i].m_Socket, m_Slots[i].m_Outgoing))
 		{
 			int Err = cSocket::GetLastError();
@@ -566,7 +576,7 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
 			{
 				m_Slots[i].m_Client->SocketClosed();
 			}
-			return;
+			continue;
 		}
 		
 		if (m_Slots[i].m_Outgoing.empty() && (m_Slots[i].m_State == sSlot::ssWritingRestOut))
diff --git a/src/Simulator/RedstoneSimulator.cpp b/src/Simulator/RedstoneSimulator.cpp
index 5749f5035..05badf0d4 100644
--- a/src/Simulator/RedstoneSimulator.cpp
+++ b/src/Simulator/RedstoneSimulator.cpp
@@ -9,7 +9,6 @@
 #include "../Blocks/BlockTorch.h"
 #include "../Blocks/BlockDoor.h"
 #include "../Piston.h"
-#include "../Tracer.h"
 
 
 
@@ -170,7 +169,7 @@ void cRedstoneSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChu
 		{
 			if (!IsAllowedBlock(Block))
 			{
-				ChunkData.erase(itr); // The new blocktype is not redstone; it must be removed from this list
+				itr->DataTwo = true; // The new blocktype is not redstone; it must be queued to be removed from this list
 			}
 			else
 			{
@@ -185,7 +184,7 @@ void cRedstoneSimulator::AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChu
 		return;
 	}
 
-	ChunkData.push_back(cCoordWithBlock(RelX, a_BlockY, RelZ, Block));
+	ChunkData.push_back(cCoordWithBlockAndBool(RelX, a_BlockY, RelZ, Block, false));
 }
 
 
@@ -208,8 +207,14 @@ void cRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, c
 	int BaseX = a_Chunk->GetPosX() * cChunkDef::Width;
 	int BaseZ = a_Chunk->GetPosZ() * cChunkDef::Width;
 
-	for (cRedstoneSimulatorChunkData::const_iterator dataitr = ChunkData.begin(); dataitr != ChunkData.end(); ++dataitr)
+	for (cRedstoneSimulatorChunkData::iterator dataitr = ChunkData.begin(); dataitr != ChunkData.end();)
 	{
+		if (dataitr->DataTwo)
+		{
+			dataitr = ChunkData.erase(dataitr);
+			continue;
+		}
+
 		int a_X = BaseX + dataitr->x;
 		int a_Z = BaseZ + dataitr->z;
 		switch (dataitr->Data)
@@ -279,6 +284,7 @@ void cRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, c
 				break;
 			}
 		}
+		++dataitr;
 	}
 }
 
@@ -919,7 +925,7 @@ void cRedstoneSimulator::HandlePressurePlate(int a_BlockX, int a_BlockY, int a_B
 		case E_BLOCK_STONE_PRESSURE_PLATE:
 		{
 			// MCS feature - stone pressure plates can only be triggered by players :D
-			cPlayer * a_Player = m_World.FindClosestPlayer(Vector3f(a_BlockX + 0.5f, (float)a_BlockY, a_BlockZ + 0.5f), 0.5f);
+			cPlayer * a_Player = m_World.FindClosestPlayer(Vector3f(a_BlockX + 0.5f, (float)a_BlockY, a_BlockZ + 0.5f), 0.5f, false);
 
 			if (a_Player != NULL)
 			{
@@ -950,19 +956,14 @@ void cRedstoneSimulator::HandlePressurePlate(int a_BlockX, int a_BlockY, int a_B
 
 				virtual bool Item(cEntity * a_Entity) override
 				{
-					cTracer LineOfSight(m_World);
-
 					Vector3f EntityPos = a_Entity->GetPosition();
 					Vector3f BlockPos(m_X + 0.5f, (float)m_Y, m_Z + 0.5f);
 					float Distance = (EntityPos - BlockPos).Length();
 
 					if (Distance < 0.5)
 					{
-						if (!LineOfSight.Trace(BlockPos, (EntityPos - BlockPos), (int)(EntityPos - BlockPos).Length()))
-						{
-							m_Entity = a_Entity;
-							return true; // Break out, we only need to know for wooden plates that at least one entity is on top
-						}
+						m_Entity = a_Entity;
+						return true; // Break out, we only need to know for wooden plates that at least one entity is on top
 					}
 					return false;
 				}
diff --git a/src/Simulator/RedstoneSimulator.h b/src/Simulator/RedstoneSimulator.h
index bb2efeb8a..c505b2a0f 100644
--- a/src/Simulator/RedstoneSimulator.h
+++ b/src/Simulator/RedstoneSimulator.h
@@ -4,7 +4,7 @@
 #include "Simulator.h"
 
 /// Per-chunk data for the simulator, specified individual chunks to simulate; 'Data' is not used
-typedef cCoordWithBlockVector cRedstoneSimulatorChunkData;
+typedef cCoordWithBlockAndBoolVector cRedstoneSimulatorChunkData;
 
 
 
diff --git a/src/World.cpp b/src/World.cpp
index 78b42e810..de2002b84 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -632,7 +632,7 @@ void cWorld::GenerateRandomSpawn(void)
 {
 	LOGD("Generating random spawnpoint...");
 
-	while (IsBlockWater(GetBlock((int)m_SpawnX, GetHeight((int)m_SpawnX, (int)m_SpawnZ), (int)m_SpawnZ)))
+	while (IsBlockWaterOrIce(GetBlock((int)m_SpawnX, GetHeight((int)m_SpawnX, (int)m_SpawnZ), (int)m_SpawnZ)))
 	{
 		if ((GetTickRandomNumber(4) % 2) == 0) // Randomise whether to increment X or Z coords
 		{
@@ -1551,7 +1551,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 	a_FlyAwaySpeed /= 100;  // Pre-divide, so that we don't have to divide each time inside the loop
 	for (cItems::const_iterator itr = a_Pickups.begin(); itr != a_Pickups.end(); ++itr)
 	{
-		if (!IsValidItem(itr->m_ItemType))
+		if (!IsValidItem(itr->m_ItemType) || itr->m_ItemType == E_BLOCK_AIR)
 		{
 			// Don't spawn pickup if item isn't even valid; should prevent client crashing too
 			continue;
@@ -1577,7 +1577,7 @@ void cWorld::SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double
 {
 	for (cItems::const_iterator itr = a_Pickups.begin(); itr != a_Pickups.end(); ++itr)
 	{
-		if (!IsValidItem(itr->m_ItemType))
+		if (!IsValidItem(itr->m_ItemType) || itr->m_ItemType == E_BLOCK_AIR)
 		{
 			continue;
 		}