Index: src/ResolvExpr/ConversionCost.cc
===================================================================
--- src/ResolvExpr/ConversionCost.cc	(revision e6b42e7a226ea0d0e4d4f46d30734a2ee84d96cb)
+++ src/ResolvExpr/ConversionCost.cc	(revision 325e6ea3f194ad588ab061cdd3cc9daa9ebcc1c3)
@@ -498,5 +498,5 @@
 ) {
 	if ( const ast::TypeInstType * inst = dynamic_cast< const ast::TypeInstType * >( dst ) ) {
-		if ( const ast::EqvClass * eqv = env.lookup( inst->name ) ) {
+		if ( const ast::EqvClass * eqv = env.lookup( *inst ) ) {
 			if ( eqv->bound ) {
 				return conversionCost(src, eqv->bound, srcIsLvalue, symtab, env );
@@ -675,9 +675,9 @@
 
 void ConversionCost_new::postvisit( const ast::TypeInstType * typeInstType ) {
-	if ( const ast::EqvClass * eqv = env.lookup( typeInstType->name ) ) {
+	if ( const ast::EqvClass * eqv = env.lookup( *typeInstType ) ) {
 		cost = costCalc( eqv->bound, dst, srcIsLvalue, symtab, env );
 	} else if ( const ast::TypeInstType * dstAsInst =
 			dynamic_cast< const ast::TypeInstType * >( dst ) ) {
-		if ( typeInstType->name == dstAsInst->name ) {
+		if ( *typeInstType == *dstAsInst ) {
 			cost = Cost::zero;
 		}