Duplicate check some of these larger hashmaps on insert, just incase

src/channels.cpp

@@ -37,7 +37,10 @@ Channel::Channel(const Anope::string &nname, time_t ts) : Flags<ChannelFlag, 3>(
 
 	this->name = nname;
 
+	size_t old = ChannelList.size();
 	ChannelList[this->name] = this;
+	if (old == ChannelList.size())
+		Log(LOG_DEBUG) << "Duplicate channel " << this->name << " in table?";
 
 	this->creation_time = ts;
 	this->server_modetime = this->chanserv_modetime = 0;

src/nickalias.cpp

@@ -41,7 +41,10 @@ NickAlias::NickAlias(const Anope::string &nickname, NickCore* nickcore) : Serial
 	this->nc = nickcore;
 	nickcore->aliases.push_back(this);
 
+	size_t old = NickAliasList->size();
 	(*NickAliasList)[this->nick] = this;
+	if (old == NickAliasList->size())
+		Log(LOG_DEBUG) << "Duplicate nick " << nickname << " in nickalias table";
 
 	if (this->nc->o == NULL)
 	{

src/nickcore.cpp

@@ -37,7 +37,10 @@ NickCore::NickCore(const Anope::string &coredisplay) : Serializable("NickCore"),
 		if (Config->NSDefFlags.HasFlag(static_cast<NickCoreFlag>(t)))
 			this->SetFlag(static_cast<NickCoreFlag>(t));
 
+	size_t old = NickCoreList->size();
 	(*NickCoreList)[this->display] = this;
+	if (old == NickCoreList->size())
+		Log(LOG_DEBUG) << "Duplicate account " << coredisplay << " in nickcore table?";
 }
 
 /** Default destructor

src/regchannel.cpp

@@ -266,7 +266,10 @@ ChannelInfo::ChannelInfo(const Anope::string &chname) : Serializable("ChannelInf
 	for (int i = 0; i < TTB_SIZE; ++i)
 		this->ttb[i] = 0;
 
+	size_t old = RegisteredChannelList->size();
 	(*RegisteredChannelList)[this->name] = this;
+	if (old == RegisteredChannelList->size())
+		Log(LOG_DEBUG) << "Duplicate channel " << this->name << " in registered channel table?";
 
 	FOREACH_MOD(I_OnCreateChan, OnCreateChan(this));
 }