m_spanningtree Fix crash when connecting to a remote server that has the same name as we do and also there is a link block with our server name and their password

See 49223cfe12ecd9071123f724e615e63841f2421d

1 files changed, 3 insertions, 2 deletions

diff --git a/src/modules/m_spanningtree/server.cpp b/src/modules/m_spanningtree/server.cpp
index a04454f51..05441da0c 100644
--- a/src/modules/m_spanningtree/server.cpp
+++ b/src/modules/m_spanningtree/server.cpp
@@ -137,8 +137,9 @@ bool TreeSocket::Outbound_Reply_Server(parameterlist &params)
 		TreeServer* CheckDupe = Utils->FindServer(sname);
 		if (CheckDupe)
 		{
-			this->SendError("Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
-			ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
+			std::string pname = CheckDupe->GetParent() ? CheckDupe->GetParent()->GetName() : "<ourself>";
+			SendError("Server "+sname+" already exists on server "+pname+"!");
+			ServerInstance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+pname);
 			return false;
 		}
 		CheckDupe = Utils->FindServer(sid);