Fixed a bug with shared sockets.

internal/control/server_test.go

@@ -262,7 +262,7 @@ func TestStaleSocketReplacementAndPrivateInstanceSelection(t *testing.T) {
 		t.Fatal("registered ancestor instance not selected", target, err)
 	}
 	target, err = server.route_target(pid, os.Geteuid()+1)
-	if err != nil || target != "" {
+	if err == nil || target != "" {
 		t.Fatal("forwarded to another user's instance", target, err)
 	}
 }