--- /dev/null
+// expected output
+#expect 0
+
+#ship debug : Debug
+#ship fifo : Fifo
+
+debug.in:
+ literal 2;
+ load repeat counter with 1;
+ recv;
+ setflags a=c, b=b;
+ [a] literal 1;
+ [!a] literal 0;
+ deliver;
+
+fifo.in:
+ notify debug.in:0;