1 files changed, 10 insertions, 0 deletions

diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 4703e4536..1320d5ccd 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -152,7 +152,9 @@ cChunk::~cChunk()
 		m_NeighborZP->m_NeighborZM = NULL;
 	}
 	delete m_WaterSimulatorData;
+	m_WaterSimulatorData = NULL;
 	delete m_LavaSimulatorData;
+	m_LavaSimulatorData = NULL;
 }
 
 
@@ -596,6 +598,7 @@ void cChunk::Tick(float a_Dt)
 				cEntity * ToDelete = *itr;
 				itr = m_Entities.erase(itr);
 				delete ToDelete;
+				ToDelete = NULL;
 				continue;
 			}
 			++itr;
@@ -1417,6 +1420,7 @@ void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType,
 		BlockEntity->Destroy();
 		RemoveBlockEntity(BlockEntity);
 		delete BlockEntity;
+		BlockEntity = NULL;
 	}
 	
 	// If the new block is a block entity, create the entity object:
@@ -1612,6 +1616,12 @@ void cChunk::AddBlockEntity(cBlockEntity * a_BlockEntity)
 
 cBlockEntity * cChunk::GetBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ)
 {
+	// Check that the query coords are within chunk bounds:
+	ASSERT(a_BlockX >= m_PosX * cChunkDef::Width);
+	ASSERT(a_BlockX < m_PosX * cChunkDef::Width + cChunkDef::Width);
+	ASSERT(a_BlockZ >= m_PosZ * cChunkDef::Width);
+	ASSERT(a_BlockZ < m_PosZ * cChunkDef::Width + cChunkDef::Width);
+
 	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
 	{
 		if (