Verify VCL failure when .create_stats() is called outside of vcl_init.

src/tests/stats.vtc

@@ -197,3 +197,35 @@ varnish v1 -vsc SELECTOR.vc1.*
 # The same for vcl2 after discard.
 varnish v1 -cli "vcl.discard vcl2"
 varnish v1 -vsc SELECTOR.vc2.*
+
+varnish v1 -vcl {
+	import ${vmod_selector};
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_init {
+		# No .create_stats() call.
+		new n = selector.set();
+		n.add("foo");
+		n.add("bar");
+		n.add("baz");
+		n.add("quux");
+	}
+
+	sub vcl_recv {
+		n.create_stats();
+		return(synth(200));
+	}
+}
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.status == 503
+	expect resp.reason == "VCL failed"
+} -run
+
+logexpect l1 -v v1 -d 1 -g vxid -q "VCL_Error" {
+	expect 0 * Begin req
+	expect * = VCL_Error {^vmod selector failure: n\.add\(\) may only be called in vcl_init$}
+	expect * = End
+} -run