Index: src/Tuples/TupleAssignment.cc
===================================================================
--- src/Tuples/TupleAssignment.cc	(revision 783152722192169260028e02eebed9a9a0c374a7)
+++ src/Tuples/TupleAssignment.cc	(revision 5f91d650a7d6b8ba36b9d0b5337f23986ecdff46)
@@ -95,5 +95,5 @@
 	bool isTuple( Expression *expr ) {
 		if ( ! expr ) return false;
-		assert( expr->has_result() );
+		assert( expr->result );
 		return dynamic_cast< TupleType * >( expr->get_result()->stripReferences() );
 	}
@@ -285,5 +285,5 @@
 
 	ObjectDecl * TupleAssignSpotter::Matcher::newObject( UniqueName & namer, Expression * expr ) {
-		assert( expr->has_result() && ! expr->get_result()->isVoid() );
+		assert( expr->result && ! expr->get_result()->isVoid() );
 		ObjectDecl * ret = new ObjectDecl( namer.newName(), Type::StorageClasses(), LinkageSpec::Cforall, nullptr, expr->get_result()->clone(), new SingleInit( expr->clone() ) );
 		// if expression type is a reference, don't need to construct anything, a simple initializer is sufficient.
@@ -295,4 +295,5 @@
 			ctorInit->accept( rm );
 		}
+		PRINT( std::cerr << "new object: " << ret << std::endl; )
 		return ret;
 	}
Index: src/Tuples/TupleExpansion.cc
===================================================================
--- src/Tuples/TupleExpansion.cc	(revision 783152722192169260028e02eebed9a9a0c374a7)
+++ src/Tuples/TupleExpansion.cc	(revision 5f91d650a7d6b8ba36b9d0b5337f23986ecdff46)
@@ -21,5 +21,4 @@
 #include "Common/ScopedMap.h"     // for ScopedMap
 #include "Common/utility.h"       // for CodeLocation
-#include "GenPoly/DeclMutator.h"  // for DeclMutator
 #include "InitTweak/InitTweak.h"  // for getFunction
 #include "Parser/LinkageSpec.h"   // for Spec, C, Intrinsic
@@ -205,5 +204,5 @@
 			decl->set_body( true );
 			for ( size_t i = 0; i < tupleSize; ++i ) {
-				TypeDecl * tyParam = new TypeDecl( toString( "tuple_param_", tupleSize, "_", i ), Type::StorageClasses(), nullptr, TypeDecl::Any );
+				TypeDecl * tyParam = new TypeDecl( toString( "tuple_param_", tupleSize, "_", i ), Type::StorageClasses(), nullptr, TypeDecl::Dtype, true );
 				decl->get_members().push_back( new ObjectDecl( toString("field_", i ), Type::StorageClasses(), LinkageSpec::C, nullptr, new TypeInstType( Type::Qualifiers(), tyParam->get_name(), tyParam ), nullptr ) );
 				decl->get_parameters().push_back( tyParam );