From dbeebfee558896219c1a44974a66548190b7d4ee Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Fri, 7 Jun 2019 12:23:48 +0200
Subject: [PATCH] SuffixMatchTree: Fix the removal of the root

---
 pdns/dnsname.hh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pdns/dnsname.hh b/pdns/dnsname.hh
index e5f6b11dbb..be58ea3c4e 100644
--- a/pdns/dnsname.hh
+++ b/pdns/dnsname.hh
@@ -299,6 +299,11 @@ struct SuffixMatchTree
    */
   void remove(std::vector<std::string> labels) const
   {
+    if (labels.empty()) { // this allows removal of the root
+      endNode = false;
+      return;
+    }
+
     SuffixMatchTree smt(*labels.rbegin());
     auto child = children.find(smt);
     if (child == children.end()) {
-- 
2.47.2