4 files changed, 41 insertions, 25 deletions

diff --git a/src/Entities/HangingEntity.cpp b/src/Entities/HangingEntity.cpp
index e789f5f18..3276bc4a0 100644
--- a/src/Entities/HangingEntity.cpp
+++ b/src/Entities/HangingEntity.cpp
@@ -43,11 +43,17 @@ void cHangingEntity::SpawnOn(cClientHandle & a_ClientHandle)
 	// The client uses different values for item frame directions and block faces. Our constants are for the block faces, so we convert them here to item frame faces
 	switch (m_BlockFace)
 	{
-		case BLOCK_FACE_ZP: break;  // Initialised to zero
+		case BLOCK_FACE_ZP: Dir = 0; break;
 		case BLOCK_FACE_ZM: Dir = 2; break;
 		case BLOCK_FACE_XM: Dir = 1; break;
 		case BLOCK_FACE_XP: Dir = 3; break;
-		default: ASSERT(!"Unhandled block face when trying to spawn item frame!"); return;
+		default:
+		{
+			LOGINFO("Invalid face (%d) in a cHangingEntity at {%d, %d, %d}, adjusting to BLOCK_FACE_XP.",
+				m_BlockFace, (int)GetPosX(), (int)GetPosY(), (int)GetPosZ()
+			);
+			Dir = 3;
+		}
 	}
 
 	if ((Dir == 0) || (Dir == 2))  // Probably a client bug, but two directions are flipped and contrary to the norm, so we do -180
diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
index 67a4c47a7..73d2a74f9 100644
--- a/src/Protocol/Protocol17x.cpp
+++ b/src/Protocol/Protocol17x.cpp
@@ -1519,9 +1519,6 @@ void cProtocol172::AddReceivedData(const char * a_Data, size_t a_Size)
 		VERIFY(m_ReceivedData.ReadToByteBuffer(bb, (int)PacketLen));
 		m_ReceivedData.CommitRead();
 
-		// Write one NUL extra, so that we can detect over-reads
-		bb.Write("\0", 1);
-		
 		UInt32 PacketType;
 		if (!bb.ReadVarInt(PacketType))
 		{
@@ -1529,6 +1526,9 @@ void cProtocol172::AddReceivedData(const char * a_Data, size_t a_Size)
 			break;
 		}
 
+		// Write one NUL extra, so that we can detect over-reads
+		bb.Write("\0", 1);
+		
 		// Log the packet info into the comm log file:
 		if (g_ShouldLogCommIn)
 		{
@@ -1536,7 +1536,7 @@ void cProtocol172::AddReceivedData(const char * a_Data, size_t a_Size)
 			bb.ReadAll(PacketData);
 			bb.ResetRead();
 			bb.ReadVarInt(PacketType);
-			ASSERT(PacketData.size() > 0);
+			ASSERT(PacketData.size() > 0);  // We have written an extra NUL, so there had to be at least one byte read
 			PacketData.resize(PacketData.size() - 1);
 			AString PacketDataHex;
 			CreateHexDump(PacketDataHex, PacketData.data(), PacketData.size(), 16);
diff --git a/src/Protocol/Protocol18x.cpp b/src/Protocol/Protocol18x.cpp
index a92ab5f54..33b6ca68e 100644
--- a/src/Protocol/Protocol18x.cpp
+++ b/src/Protocol/Protocol18x.cpp
@@ -1716,7 +1716,7 @@ void cProtocol180::AddReceivedData(const char * a_Data, size_t a_Size)
 			m_ReceivedData.ResetRead();
 			break;
 		}
-		cByteBuffer bb(PacketLen);
+		cByteBuffer bb(PacketLen + 1);
 		VERIFY(m_ReceivedData.ReadToByteBuffer(bb, (int)PacketLen));
 		m_ReceivedData.CommitRead();
 
@@ -1731,9 +1731,6 @@ void cProtocol180::AddReceivedData(const char * a_Data, size_t a_Size)
 			}
 		}
 
-		// Write one NUL extra, so that we can detect over-reads
-		bb.Write("\0", 1);
-		
 		UInt32 PacketType;
 		if (!bb.ReadVarInt(PacketType))
 		{
@@ -1741,6 +1738,9 @@ void cProtocol180::AddReceivedData(const char * a_Data, size_t a_Size)
 			break;
 		}
 
+		// Write one NUL extra, so that we can detect over-reads
+		bb.Write("\0", 1);
+		
 		// Log the packet info into the comm log file:
 		if (g_ShouldLogCommIn)
 		{
@@ -1748,7 +1748,7 @@ void cProtocol180::AddReceivedData(const char * a_Data, size_t a_Size)
 			bb.ReadAll(PacketData);
 			bb.ResetRead();
 			bb.ReadVarInt(PacketType);
-			ASSERT(PacketData.size() > 0);
+			ASSERT(PacketData.size() > 0);  // We have written an extra NUL, so there had to be at least one byte read
 			PacketData.resize(PacketData.size() - 1);
 			AString PacketDataHex;
 			CreateHexDump(PacketDataHex, PacketData.data(), PacketData.size(), 16);
@@ -1782,7 +1782,8 @@ void cProtocol180::AddReceivedData(const char * a_Data, size_t a_Size)
 			return;
 		}
 
-		if (bb.GetReadableSpace() != 0)
+		// The packet should have 1 byte left in the buffer - the NUL we had added
+		if (bb.GetReadableSpace() != 1)
 		{
 			// Read more or less than packet length, report as error
 			LOGWARNING("Protocol 1.8: Wrong number of bytes read for packet 0x%x, state %d. Read " SIZE_T_FMT " bytes, packet contained %u bytes",
diff --git a/src/Simulator/IncrementalRedstoneSimulator.cpp b/src/Simulator/IncrementalRedstoneSimulator.cpp
index 7b3a2c2fa..8649a1841 100644
--- a/src/Simulator/IncrementalRedstoneSimulator.cpp
+++ b/src/Simulator/IncrementalRedstoneSimulator.cpp
@@ -1619,17 +1619,22 @@ bool cIncrementalRedstoneSimulator::IsRepeaterLocked(int a_RelBlockX, int a_RelB
 		{
 			// Check if eastern(right) neighbor is a powered on repeater who is facing us
 			BLOCKTYPE Block = 0;
-			if (m_Chunk->UnboundedRelGetBlockType(a_RelBlockX + 1, a_RelBlockY, a_RelBlockZ, Block) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))  // Is right neighbor a powered repeater?
+			NIBBLETYPE OtherRepeaterDir = 0;
+			if (m_Chunk->UnboundedRelGetBlock(a_RelBlockX + 1, a_RelBlockY, a_RelBlockZ, Block, OtherRepeaterDir) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))  // Is right neighbor a powered repeater?
 			{
-				NIBBLETYPE OtherRepeaterDir = m_Chunk->GetMeta(a_RelBlockX + 1, a_RelBlockY, a_RelBlockZ) & 0x3;
-				if (OtherRepeaterDir == 0x3) { return true; }  // If so, I am latched/locked
+				if ((OtherRepeaterDir & 0x03) == 0x03)
+				{
+					return true;
+				}  // If so, I am latched/locked
 			}
 
 			// Check if western(left) neighbor is a powered on repeater who is facing us
-			if (m_Chunk->UnboundedRelGetBlockType(a_RelBlockX - 1, a_RelBlockY, a_RelBlockZ, Block) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
+			if (m_Chunk->UnboundedRelGetBlock(a_RelBlockX - 1, a_RelBlockY, a_RelBlockZ, Block, OtherRepeaterDir) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
 			{
-				NIBBLETYPE OtherRepeaterDir = m_Chunk->GetMeta(a_RelBlockX -1, a_RelBlockY, a_RelBlockZ) & 0x3;
-				if (OtherRepeaterDir == 0x1) { return true; }  // If so, I am latched/locked
+				if ((OtherRepeaterDir & 0x03) == 0x01)
+				{
+					return true;
+				}  // If so, I am latched/locked
 			}
 
 			break;
@@ -1641,19 +1646,23 @@ bool cIncrementalRedstoneSimulator::IsRepeaterLocked(int a_RelBlockX, int a_RelB
 		{
 			// Check if southern(down) neighbor is a powered on repeater who is facing us
 			BLOCKTYPE Block = 0;
-			if (m_Chunk->UnboundedRelGetBlockType(a_RelBlockX, a_RelBlockY, a_RelBlockZ + 1, Block) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
+			NIBBLETYPE OtherRepeaterDir = 0;
+			if (m_Chunk->UnboundedRelGetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ + 1, Block, OtherRepeaterDir) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
 			{
-				NIBBLETYPE OtherRepeaterDir = m_Chunk->GetMeta(a_RelBlockX, a_RelBlockY, a_RelBlockZ + 1) & 0x3;
-				if (OtherRepeaterDir == 0x0) { return true; }  // If so,  am latched/locked
+				if ((OtherRepeaterDir & 0x03) == 0x00)
+				{
+					return true;
+				}  // If so,  am latched/locked
 			}
 			
 			// Check if northern(up) neighbor is a powered on repeater who is facing us
-			if (m_Chunk->UnboundedRelGetBlockType(a_RelBlockX, a_RelBlockY, a_RelBlockZ - 1, Block) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
+			if (m_Chunk->UnboundedRelGetBlock(a_RelBlockX, a_RelBlockY, a_RelBlockZ - 1, Block, OtherRepeaterDir) && (Block == E_BLOCK_REDSTONE_REPEATER_ON))
 			{
-				NIBBLETYPE OtherRepeaterDir = m_Chunk->GetMeta(a_RelBlockX, a_RelBlockY, a_RelBlockZ - 1) & 0x3;
-				if (OtherRepeaterDir == 0x2) { return true; }  // If so, I am latched/locked
+				if ((OtherRepeaterDir & 0x03) == 0x02)
+				{
+					return true;
+				}  // If so, I am latched/locked
 			}
-
 			break;
 		}
 	}