Index: src/Parser/parser.yy
===================================================================
--- src/Parser/parser.yy	(revision 4f748c526a24ee1180354967a91c27edd9dda5ce)
+++ src/Parser/parser.yy	(revision f9941ff08adf6cc1d6d77e61ea910cc9f82ecbce)
@@ -458,7 +458,7 @@
 		{ $$ = new ExpressionNode( new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >($2) ) ) ); }
 	| type_name '.' no_attr_identifier					// CFA, nested type
-		{ $$ = nullptr; }								// FIX ME
+		{ throw SemanticError("Qualified names are currently unimplemented."); $$ = nullptr; }								// FIX ME
 	| type_name '.' '[' push field_list pop ']'			// CFA, nested type / tuple field selector
-		{ $$ = nullptr; }								// FIX ME
+		{ throw SemanticError("Qualified names are currently unimplemented."); $$ = nullptr; }								// FIX ME
 	;