1 files changed, 18 insertions, 0 deletions
diff --git a/doc/progs/eff_unused1.go b/doc/progs/eff_unused1.go
new file mode 100644
index 000000000..f990a19f7
--- /dev/null
+++ b/doc/progs/eff_unused1.go
@@ -0,0 +1,18 @@
+// skip
+
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+func main() {
+	fd, err := os.Open("test.go")
+	if err != nil {
+		log.Fatal(err)
+	}
+	// TODO: use fd.
+}