diff --git a/oscar64/InterCodeGenerator.cpp b/oscar64/InterCodeGenerator.cpp
index 9fe9cf9..da41554 100644
--- a/oscar64/InterCodeGenerator.cpp
+++ b/oscar64/InterCodeGenerator.cpp
@@ -2452,8 +2452,16 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateExpression(Declaration*
 			if (vl.mType->mType == DT_TYPE_POINTER || vr.mType->mType == DT_TYPE_POINTER)
 			{
 				dtype = vl.mType;
-				if (vl.mType->IsIntegerType() || vr.mType->IsIntegerType())
-					;
+				if (vl.mType->IsIntegerType())
+				{
+					if ((mCompilerOptions & COPT_CPLUSPLUS) || exp->mLeft->mType != EX_CONSTANT || exp->mLeft->mDecValue->mInteger != 0)
+						mErrors->Error(exp->mLocation, EERR_INCOMPATIBLE_TYPES, "Cannot compare integer and pointer");
+				}
+				else if (vr.mType->IsIntegerType())
+				{
+					if ((mCompilerOptions & COPT_CPLUSPLUS) || exp->mRight->mType != EX_CONSTANT || exp->mRight->mDecValue->mInteger != 0)
+						mErrors->Error(exp->mLocation, EERR_INCOMPATIBLE_TYPES, "Cannot compare integer and pointer");
+				}
 				else if ((vl.mType->mType == DT_TYPE_POINTER || vl.mType->mType == DT_TYPE_ARRAY) && (vr.mType->mType == DT_TYPE_POINTER || vr.mType->mType == DT_TYPE_ARRAY))
 				{
 					if (vl.mType->mBase->mType == DT_TYPE_VOID || vr.mType->mBase->mType == DT_TYPE_VOID)
diff --git a/oscar64/NativeCodeGenerator.cpp b/oscar64/NativeCodeGenerator.cpp
index 308af63..166976a 100644
--- a/oscar64/NativeCodeGenerator.cpp
+++ b/oscar64/NativeCodeGenerator.cpp
@@ -12350,7 +12350,7 @@ void NativeCodeBasicBlock::BuildCollisionTable(NumberSet* collisionSets)
 	}
 }
 
-void NativeCodeBasicBlock::BuildDominatorTree(NativeCodeBasicBlock* from)
+void NativeCodeBasicBlock::BuildDominatorTree(NativeCodeBasicBlock* from, DominatorStacks& stacks)
 {
 	if (from == this)
 		return;
@@ -12360,25 +12360,26 @@ void NativeCodeBasicBlock::BuildDominatorTree(NativeCodeBasicBlock* from)
 		return;
 	else
 	{
-		ExpandingArray< NativeCodeBasicBlock * >	d1, d2;
+		stacks.d1.SetSize(0);
+		stacks.d2.SetSize(0);
 
 		NativeCodeBasicBlock* b = mDominator;
 		while (b)
 		{
-			d1.Push(b);
+			stacks.d1.Push(b);
 			b = b->mDominator;
 		}
 		b = from;
 		while (b)
 		{
-			d2.Push(b);
+			stacks.d2.Push(b);
 			b = b->mDominator;
 		}
 
 		b = nullptr;
-		while (d1.Size() > 0 && d2.Size() > 0 && d1.Last() == d2.Last())
+		while (stacks.d1.Size() > 0 && stacks.d2.Size() > 0 && stacks.d1.Last() == stacks.d2.Last())
 		{
-			b = d1.Pop(); d2.Pop();
+			b = stacks.d1.Pop(); stacks.d2.Pop();
 		}
 
 		if (mDominator == b)
@@ -12388,9 +12389,9 @@ void NativeCodeBasicBlock::BuildDominatorTree(NativeCodeBasicBlock* from)
 	}
 
 	if (mTrueJump)
-		mTrueJump->BuildDominatorTree(this);
+		mTrueJump->BuildDominatorTree(this, stacks);
 	if (mFalseJump)
-		mFalseJump->BuildDominatorTree(this);
+		mFalseJump->BuildDominatorTree(this, stacks);
 }
 
 
@@ -40657,8 +40658,9 @@ void NativeCodeProcedure::RebuildEntry(void)
 	ResetVisited();
 	mEntryBlock->CollectEntryBlocks(nullptr);
 
+	NativeCodeBasicBlock::DominatorStacks	 stacks;
 
-	mEntryBlock->BuildDominatorTree(nullptr);
+	mEntryBlock->BuildDominatorTree(nullptr, stacks);
 }
 
 void NativeCodeProcedure::Optimize(void)
@@ -41523,13 +41525,14 @@ void NativeCodeProcedure::ResetPatched(void)
 {
 	for (int i = 0; i < mBlocks.Size(); i++)
 	{
-		mBlocks[i]->mPatched = false;
-		mBlocks[i]->mPatchFail = false;
-		mBlocks[i]->mPatchChecked = false;
-		mBlocks[i]->mPatchStart = false;
-		mBlocks[i]->mPatchLoop = false;
-		mBlocks[i]->mPatchLoopChanged = false;
-		mBlocks[i]->mPatchExit = false;
+		NativeCodeBasicBlock* b = mBlocks[i];
+		b->mPatched = false;
+		b->mPatchFail = false;
+		b->mPatchChecked = false;
+		b->mPatchStart = false;
+		b->mPatchLoop = false;
+		b->mPatchLoopChanged = false;
+		b->mPatchExit = false;
 	}
 }
 
diff --git a/oscar64/NativeCodeGenerator.h b/oscar64/NativeCodeGenerator.h
index b5c8c5e..97e44bb 100644
--- a/oscar64/NativeCodeGenerator.h
+++ b/oscar64/NativeCodeGenerator.h
@@ -370,7 +370,13 @@ public:
 	NativeCodeBasicBlock * ForwardAccuBranch(bool eq, bool ne, bool pl, bool mi, int limit);
 	bool MergeBasicBlocks(void);
 	void MarkLoopHead(void);
-	void BuildDominatorTree(NativeCodeBasicBlock * from);
+
+	struct DominatorStacks
+	{
+		ExpandingArray< NativeCodeBasicBlock* >	d1, d2;
+	};
+
+	void BuildDominatorTree(NativeCodeBasicBlock * from, DominatorStacks & stacks);
 
 	bool MoveLoadStoreUp(int at);
 	bool MoveLoadStoreXUp(int at);
diff --git a/oscar64/Parser.cpp b/oscar64/Parser.cpp
index 7f523b5..79cbbaf 100644
--- a/oscar64/Parser.cpp
+++ b/oscar64/Parser.cpp
@@ -1253,7 +1253,7 @@ void Parser::PrependMemberConstructor(Declaration* pthis, Declaration* cfunc)
 {
 	Expression* pthisexp = new Expression(pthis->mLocation, EX_VARIABLE);
 	pthisexp->mDecType = pthis;
-	pthisexp->mDecValue = pthis->mBase->mDestructor->mBase->mParams;
+	pthisexp->mDecValue = cfunc->mBase->mParams;
 
 	Expression* thisexp = new Expression(mScanner->mLocation, EX_PREFIX);
 	thisexp->mToken = TK_MUL;
diff --git a/samples/memmap/charsetload.d64 b/samples/memmap/charsetload.d64
index 10be50b..ea91a38 100644
Binary files a/samples/memmap/charsetload.d64 and b/samples/memmap/charsetload.d64 differ