--- /dev/null
+-------- @freevars fv1 --------
+Free identifiers:
+type C
+const exp int
+var x int
+
+-------- @freevars fv2 --------
+Free identifiers:
+var s.t.a int
+var s.t.b int
+var s.x int
+var x int
+var y rune
+
+-------- @freevars fv3 --------
+Free identifiers:
+var x int
+
+-------- @freevars fv-def-label --------
+No free identifiers.
+
+-------- @freevars fv-ref-label --------
+Free identifiers:
+label loop
+