Reset CompilerContext's visited nodes at compile start

libsolidity/Compiler.cpp

@@ -74,6 +74,7 @@ void Compiler::initializeContext(ContractDefinition const& _contract,
 	m_context.setCompiledContracts(_contracts);
 	m_context.setInheritanceHierarchy(_contract.getLinearizedBaseContracts());
 	registerStateVariables(_contract);
+	m_context.resetVisitedNodes(&_contract);
 }
 
 void Compiler::packIntoContractCreator(ContractDefinition const& _contract, CompilerContext const& _runtimeContext)

libsolidity/CompilerContext.cpp

@@ -166,6 +166,13 @@ u256 CompilerContext::getStorageLocationOfVariable(const Declaration& _declarati
 	return it->second;
 }
 
+void CompilerContext::resetVisitedNodes(ASTNode const* _node)
+{
+	stack<ASTNode const*> newStack;
+	newStack.push(_node);
+	std::swap(m_visitedNodes, newStack);
+}
+
 CompilerContext& CompilerContext::operator<<(eth::AssemblyItem _item)
 {
 	solAssert(m_visitedNodes.size() > 0, "No node on the visited stack");

libsolidity/CompilerContext.h

@@ -100,6 +100,8 @@ public:
 	void appendProgramSize() { return m_asm.appendProgramSize(); }
 	/// Adds data to the data section, pushes a reference to the stack
 	eth::AssemblyItem appendData(bytes const& _data) { return m_asm.append(_data); }
+	/// Resets the stack of visited nodes with a new stack having only @c _node
+	void resetVisitedNodes(ASTNode const* _node);
 	/// Pops the stack of visited nodes
 	void popVisitedNodes() { m_visitedNodes.pop();}
 	/// Pushes an ASTNode to the stack of visited nodes

test/SolidityExpressionCompiler.cpp

@@ -127,6 +127,7 @@ bytes compileFirstExpression(const string& _sourceCode, vector<vector<string>> _
 			BOOST_REQUIRE(extractor.getExpression() != nullptr);
 
 			CompilerContext context;
+			context.resetVisitedNodes(contract);
 			context.setInheritanceHierarchy(inheritanceHierarchy);
 			unsigned parametersSize = _localVariables.size(); // assume they are all one slot on the stack
 			context.adjustStackOffset(parametersSize);