Index: tests/io/comp_basic.cfa
===================================================================
--- tests/io/comp_basic.cfa	(revision aca0d2f510429843eb53e3fd4cb1160ade5d68d3)
+++ tests/io/comp_basic.cfa	(revision 8b639f90562cdcfdf350d5c828560783e4ce4aff)
@@ -75,5 +75,5 @@
 // takes its sweet time so the Reader has to block
 thread Writer {};
-void main(Writer & this) {
+void main(Writer &) {
 	for(TIMES) {
 		block( globals.bar );