Index: tests/io/comp_basic.cfa
===================================================================
--- tests/io/comp_basic.cfa	(revision 2284d20aa154b6cfdf4a4051fa40e4d6170688bd)
+++ tests/io/comp_basic.cfa	(revision 69698d26e4cfbbec45c9e750496ea70072104db0)
@@ -45,4 +45,5 @@
 thread Reader {};
 void main(Reader & this) {
+	char thrash[1];
 	bool do_read = has_user_level_blocking( (fptr_t)async_read );
 
@@ -50,5 +51,4 @@
 		io_future_t f;
 		if ( do_read ) {
-			char thrash[1];
 			async_read(f, globals.pipe[0], thrash, 1, 0);
 		} else {
Index: tests/io/comp_fair.cfa
===================================================================
--- tests/io/comp_fair.cfa	(revision 2284d20aa154b6cfdf4a4051fa40e4d6170688bd)
+++ tests/io/comp_fair.cfa	(revision 69698d26e4cfbbec45c9e750496ea70072104db0)
@@ -65,4 +65,5 @@
 thread Reader {};
 void main(Reader & this) {
+	char thrash[1];
 	bool do_read = has_user_level_blocking( (fptr_t)async_read );
 
@@ -70,5 +71,4 @@
 		io_future_t f;
 		if ( do_read ) {
-			char thrash[1];
 			async_read(f, globals.pipe[0], thrash, 1, 0);
 		} else {