Index: tests/concurrency/actors/dynamic.cfa
===================================================================
--- tests/concurrency/actors/dynamic.cfa	(revision 41882628bfa69f8a243e4ff726329c75f9ba655a)
+++ tests/concurrency/actors/dynamic.cfa	(revision 9ae4f5faee2cde9d3e0c43839e5d90b9d87b98a7)
@@ -19,5 +19,5 @@
 void ?{}( derived_msg & this ) { ((derived_msg &)this){ 0 }; }
 
-allocation receive( derived_actor & receiver, derived_msg & msg ) {
+allocation receive( derived_actor &, derived_msg & msg ) {
 	if ( msg.cnt >= Times ) {
 		sout | "Done";
Index: tests/concurrency/actors/inherit.cfa
===================================================================
--- tests/concurrency/actors/inherit.cfa	(revision 41882628bfa69f8a243e4ff726329c75f9ba655a)
+++ tests/concurrency/actors/inherit.cfa	(revision 9ae4f5faee2cde9d3e0c43839e5d90b9d87b98a7)
@@ -21,8 +21,8 @@
 }
 
-allocation receive( Server & receiver, D_msg & msg ) { return handle(); }
-allocation receive( Server & receiver, D_msg2 & msg ) { return handle(); }
-allocation receive( Server2 & receiver, D_msg & msg ) { return Delete; }
-allocation receive( Server2 & receiver, D_msg2 & msg ) { return Delete; }
+allocation receive( Server &, D_msg & ) { return handle(); }
+allocation receive( Server &, D_msg2 & ) { return handle(); }
+allocation receive( Server2 &, D_msg & ) { return Delete; }
+allocation receive( Server2 &, D_msg2 & ) { return Delete; }
 
 int main() {
Index: tests/concurrency/actors/inline.cfa
===================================================================
--- tests/concurrency/actors/inline.cfa	(revision 41882628bfa69f8a243e4ff726329c75f9ba655a)
+++ tests/concurrency/actors/inline.cfa	(revision 9ae4f5faee2cde9d3e0c43839e5d90b9d87b98a7)
@@ -50,7 +50,7 @@
 		d_msg2 dm{ 29079 };
 		set_allocation( dm, Nodelete );
-		msg_wrapper * mw = &dm;
-		message * mg = &dm;
-		virtual_dtor * v = &dm;
+		msg_wrapper * mw = &dm;		(void) mw;
+		message * mg = &dm;			(void) mg;
+		virtual_dtor * v = &dm;		(void) v;
 		da | dm;
 		actor_stop();								// waits until actors finish
Index: tests/concurrency/actors/pingpong.cfa
===================================================================
--- tests/concurrency/actors/pingpong.cfa	(revision 41882628bfa69f8a243e4ff726329c75f9ba655a)
+++ tests/concurrency/actors/pingpong.cfa	(revision 9ae4f5faee2cde9d3e0c43839e5d90b9d87b98a7)
@@ -20,5 +20,5 @@
 size_t times = 100000;
 
-allocation receive( ping & receiver, p_msg & msg ) {
+allocation receive( ping &, p_msg & msg ) {
 	msg.count++;
 	if ( msg.count > times ) return Finished;
@@ -30,5 +30,5 @@
 }
 
-allocation receive( pong & receiver, p_msg & msg ) {
+allocation receive( pong &, p_msg & msg ) {
 	msg.count++;
 	if ( msg.count > times ) return Finished;
@@ -42,5 +42,5 @@
 size_t Processors = 2;
 
-int main( int argc, char * argv[] ) {
+int main() {
 	sout | "start";
 
Index: tests/concurrency/actors/types.cfa
===================================================================
--- tests/concurrency/actors/types.cfa	(revision 41882628bfa69f8a243e4ff726329c75f9ba655a)
+++ tests/concurrency/actors/types.cfa	(revision 9ae4f5faee2cde9d3e0c43839e5d90b9d87b98a7)
@@ -36,5 +36,5 @@
 };
 
-allocation receive( derived_actor2 & receiver, d_msg & msg ) {
+allocation receive( derived_actor2 &, d_msg & msg ) {
 	mutex(sout) sout | msg.num;
 	return Finished;
@@ -48,5 +48,5 @@
 };
 
-allocation receive( derived_actor3 & receiver, d_msg & msg ) {
+allocation receive( derived_actor3 &, d_msg & msg ) {
 	mutex(sout) sout | msg.num;
 	if ( msg.num == -1 ) return Nodelete;
@@ -54,5 +54,5 @@
 }
 
-allocation receive( derived_actor3 & receiver, d_msg2 & msg ) {
+allocation receive( derived_actor3 &, d_msg2 & msg ) {
 	mutex(sout) sout | msg.num;
 	return Finished;
@@ -61,5 +61,5 @@
 size_t Processors = 3;
 
-int main( int argc, char * argv[] ) {
+int main() {
 	sout | "start";