From 3fe254abcc170a2aacdfd5a4b021691d8b76db0d Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Thu, 16 Dec 2021 23:29:15 +0000
Subject: [PATCH] Suggest a reason why '-' cannot be resolved

---
 TargetGroup.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/TargetGroup.cc b/TargetGroup.cc
index 5558250c7..3b3ac980c 100644
--- a/TargetGroup.cc
+++ b/TargetGroup.cc
@@ -802,6 +802,8 @@ int TargetGroup::get_next_host(struct sockaddr_storage *ss, size_t *sslen) {
   }
   else {
     error("Failed to resolve \"%s\".", this->netblock->hostname.c_str());
+    if (this->netblock->hostname == "-")
+      error("Bare '-': did you put a space between '--'?");
     return -1;
   }