8 files changed, 29 insertions, 15 deletions
diff --git a/src/commands/cmd_motd.cpp b/src/commands/cmd_motd.cpp
index 8e227723e..869a9c353 100644
--- a/src/commands/cmd_motd.cpp
+++ b/src/commands/cmd_motd.cpp
@@ -53,7 +53,7 @@ CmdResult CommandMotd::Handle (const std::vector<std::string>& parameters, User
 	if (parameters.size() > 0 && parameters[0] != ServerInstance->Config->ServerName)
 		return CMD_SUCCESS;
 
-	ConfigTag* tag = NULL;
+	ConfigTag* tag = ServerInstance->Config->EmptyTag;
 	if (IS_LOCAL(user))
 		tag = user->GetClass()->config;
 	std::string motd_name = tag->getString("motd", "motd");
diff --git a/src/commands/cmd_rules.cpp b/src/commands/cmd_rules.cpp
index 5d41aa4b8..17de9f3f2 100644
--- a/src/commands/cmd_rules.cpp
+++ b/src/commands/cmd_rules.cpp
@@ -51,7 +51,7 @@ CmdResult CommandRules::Handle (const std::vector<std::string>& parameters, User
 	if (parameters.size() > 0 && parameters[0] != ServerInstance->Config->ServerName)
 		return CMD_SUCCESS;
 
-	ConfigTag* tag = NULL;
+	ConfigTag* tag = ServerInstance->Config->EmptyTag;
 	if (IS_LOCAL(user))
 		tag = user->GetClass()->config;
 	std::string rules_name = tag->getString("rules", "rules");
diff --git a/src/commands/cmd_whois.cpp b/src/commands/cmd_whois.cpp
index ba2ad9c15..ab0b82fff 100644
--- a/src/commands/cmd_whois.cpp
+++ b/src/commands/cmd_whois.cpp
@@ -76,7 +76,7 @@ CmdResult CommandWhois::Handle (const std::vector<std::string>& parameters, User
 		 */
 		if (IS_LOCAL(dest) && (ServerInstance->Config->HideWhoisServer.empty() || parameters.size() > 1))
 		{
-			idle = abs((long)((dest->idle_lastmsg)-ServerInstance->Time()));
+			idle = labs((long)((dest->idle_lastmsg)-ServerInstance->Time()));
 			signon = dest->signon;
 		}
 
diff --git a/src/configparser.cpp b/src/configparser.cpp
index 825dfc966..94192a71b 100644
--- a/src/configparser.cpp
+++ b/src/configparser.cpp
@@ -390,8 +390,17 @@ bool ParseStack::ParseExec(const std::string& name, int flags, const std::string
 
 bool ConfigTag::readString(const std::string& key, std::string& value, bool allow_lf)
 {
+#ifdef __clang__
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wunknown-pragmas"
+# pragma clang diagnostic ignored "-Wundefined-bool-conversion"
+#endif
+	// TODO: this is undefined behaviour but changing the API is too risky for 2.0.
 	if (!this)
 		return false;
+#ifdef __clang__
+# pragma clang diagnostic pop
+#endif
 	for(std::vector<KeyVal>::iterator j = items.begin(); j != items.end(); ++j)
 	{
 		if(j->first != key)
diff --git a/src/configreader.cpp b/src/configreader.cpp
index 060f66d16..b5d2fdb16 100644
--- a/src/configreader.cpp
+++ b/src/configreader.cpp
@@ -48,6 +48,14 @@ ServerConfig::ServerConfig()
 	OperMaxChans = 30;
 	c_ipv4_range = 32;
 	c_ipv6_range = 128;
+
+	std::vector<KeyVal>* items;
+	EmptyTag = ConfigTag::create("empty", "<auto>", 0, items);
+}
+
+ServerConfig::~ServerConfig()
+{
+	delete EmptyTag;
 }
 
 void ServerConfig::Update005()
@@ -888,7 +896,7 @@ ConfigTag* ServerConfig::ConfValue(const std::string &tag)
 {
 	ConfigTagList found = config_data.equal_range(tag);
 	if (found.first == found.second)
-		return NULL;
+		return EmptyTag;
 	ConfigTag* rv = found.first->second;
 	found.first++;
 	if (found.first != found.second)
diff --git a/src/modules/m_spanningtree/idle.cpp b/src/modules/m_spanningtree/idle.cpp
index 0ea06a3cc..18aeb0ad5 100644
--- a/src/modules/m_spanningtree/idle.cpp
+++ b/src/modules/m_spanningtree/idle.cpp
@@ -40,7 +40,7 @@ bool TreeSocket::Whois(const std::string &prefix, parameterlist &params)
 			User* x = ServerInstance->FindNick(params[0]);
 			if ((x) && (IS_LOCAL(x)))
 			{
-				long idle = abs((long)((x->idle_lastmsg) - ServerInstance->Time()));
+				long idle = labs((long)((x->idle_lastmsg) - ServerInstance->Time()));
 				parameterlist par;
 				par.push_back(prefix);
 				par.push_back(ConvToStr(x->signon));
diff --git a/src/modules/m_spanningtree/treesocket2.cpp b/src/modules/m_spanningtree/treesocket2.cpp
index fb658c9c7..acb822fbf 100644
--- a/src/modules/m_spanningtree/treesocket2.cpp
+++ b/src/modules/m_spanningtree/treesocket2.cpp
@@ -155,13 +155,13 @@ void TreeSocket::ProcessLine(std::string &line)
 					time_t delta = them - ServerInstance->Time();
 					if ((delta < -600) || (delta > 600))
 					{
-						ServerInstance->SNO->WriteGlobalSno('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs((long)delta));
-						SendError("Your clocks are out by "+ConvToStr(abs((long)delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
+						ServerInstance->SNO->WriteGlobalSno('l',"\2ERROR\2: Your clocks are out by %ld seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",labs((long)delta));
+						SendError("Your clocks are out by "+ConvToStr(labs((long)delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
 						return;
 					}
 					else if ((delta < -30) || (delta > 30))
 					{
-						ServerInstance->SNO->WriteGlobalSno('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs((long)delta));
+						ServerInstance->SNO->WriteGlobalSno('l',"\2WARNING\2: Your clocks are out by %ld seconds. Please consider synching your clocks.", labs((long)delta));
 					}
 				}
 
diff --git a/src/server.cpp b/src/server.cpp
index 4741f942d..d05ece8a4 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -46,13 +46,10 @@ void InspIRCd::Exit(int status)
 #ifdef _WIN32
 	SetServiceStopped(status);
 #endif
-	if (this)
-	{
-		this->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
-		this->Cleanup();
-		delete this;
-		ServerInstance = NULL;
-	}
+	this->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
+	this->Cleanup();
+	delete this;
+	ServerInstance = NULL;
 	exit (status);
 }