diff --git a/libsolidity/Compiler.h b/libsolidity/Compiler.h
index 76f16f3ab..4b1e1b4d6 100644
--- a/libsolidity/Compiler.h
+++ b/libsolidity/Compiler.h
@@ -94,8 +94,8 @@ private:
 	std::vector<eth::AssemblyItem> m_continueTags; ///< tag to jump to for a "continue" statement
 	eth::AssemblyItem m_returnTag; ///< tag to jump to for a "return" statement
 	unsigned m_modifierDepth = 0;
-	FunctionDefinition const* m_currentFunction;
-	unsigned m_stackCleanupForReturn; ///< this number of stack elements need to be removed before jump to m_returnTag
+	FunctionDefinition const* m_currentFunction = nullptr;
+	unsigned m_stackCleanupForReturn = 0; ///< this number of stack elements need to be removed before jump to m_returnTag
 	// arguments for base constructors, filled in derived-to-base order
 	std::map<FunctionDefinition const*, std::vector<ASTPointer<Expression>> const*> m_baseArguments;
 };
diff --git a/libsolidity/Parser.h b/libsolidity/Parser.h
index 87eb2f8ff..cc0b2ca17 100644
--- a/libsolidity/Parser.h
+++ b/libsolidity/Parser.h
@@ -34,6 +34,8 @@ class Scanner;
 class Parser
 {
 public:
+	Parser() {}
+
 	ASTPointer<SourceUnit> parse(std::shared_ptr<Scanner> const& _scanner);
 	std::shared_ptr<std::string const> const& getSourceName() const;
 
diff --git a/solc/CommandLineInterface.cpp b/solc/CommandLineInterface.cpp
index 08acb5ebd..867e832d7 100644
--- a/solc/CommandLineInterface.cpp
+++ b/solc/CommandLineInterface.cpp
@@ -345,18 +345,11 @@ bool CommandLineInterface::processInput()
 void CommandLineInterface::handleAst(string const& _argStr)
 {
 	string title;
-	string suffix;
 
 	if (_argStr == g_argAstStr)
-	{
 		title = "Syntax trees:";
-		suffix = ".ast";
-	}
 	else if (_argStr == g_argAstJson)
-	{
 		title = "JSON AST:";
-		suffix = ".json";
-	}
 	else
 		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Illegal argStr for AST"));