diff --git a/scripts/base/frameworks/cluster/setup-connections.zeek b/scripts/base/frameworks/cluster/setup-connections.zeek
index 9e9374c8b9..2abd57b142 100644
--- a/scripts/base/frameworks/cluster/setup-connections.zeek
+++ b/scripts/base/frameworks/cluster/setup-connections.zeek
@@ -28,7 +28,6 @@ function connect_peer(node_type: NodeType, node_name: string)
 
 function connect_peers_with_type(node_type: NodeType)
 	{
-	local rval: vector of NamedNode = vector();
 	local nn = nodes_with_type(node_type);
 
 	for ( i in nn )
diff --git a/scripts/base/frameworks/netcontrol/main.zeek b/scripts/base/frameworks/netcontrol/main.zeek
index f22d1eb06c..872128a8e0 100644
--- a/scripts/base/frameworks/netcontrol/main.zeek
+++ b/scripts/base/frameworks/netcontrol/main.zeek
@@ -731,7 +731,7 @@ function find_rules_subnet(sn: subnet) : vector of Rule
 		{
 		local sn_entry = matches[m];
 		local rule_ids = rules_by_subnets[sn_entry];
-		for ( rule_id in rules_by_subnets[sn_entry] )
+		for ( rule_id in rule_ids )
 			{
 			if ( rule_id in rules )
 				ret += rules[rule_id];
diff --git a/scripts/base/frameworks/netcontrol/plugins/openflow.zeek b/scripts/base/frameworks/netcontrol/plugins/openflow.zeek
index d80d7c4a41..d22e5f3125 100644
--- a/scripts/base/frameworks/netcontrol/plugins/openflow.zeek
+++ b/scripts/base/frameworks/netcontrol/plugins/openflow.zeek
@@ -195,7 +195,7 @@ function entity_to_match(p: PluginState, e: Entity): vector of OpenFlow::ofp_mat
 		return openflow_match_pred(p, e, v);
 		}
 
-	local proto = OpenFlow::IP_TCP;
+	# local proto = OpenFlow::IP_TCP;
 
 	if ( e$ty == FLOW )
 		{
diff --git a/scripts/base/protocols/smtp/main.zeek b/scripts/base/protocols/smtp/main.zeek
index 0d9b4e97ab..7ee4a6cee5 100644
--- a/scripts/base/protocols/smtp/main.zeek
+++ b/scripts/base/protocols/smtp/main.zeek
@@ -336,5 +336,6 @@ function describe(rec: Info): string
 			(|rec$rcptto|>1 ? fmt(" (plus %d others)", |rec$rcptto|-1) : ""),
 			(abbrev_subject != "" ? fmt(": %s", abbrev_subject) : ""));
 		}
-		return "";
+
+	return "";
 	}
diff --git a/scripts/base/utils/addrs.zeek b/scripts/base/utils/addrs.zeek
index a4a4ef98e2..c2d8779fe6 100644
--- a/scripts/base/utils/addrs.zeek
+++ b/scripts/base/utils/addrs.zeek
@@ -70,11 +70,10 @@ const ip_addr_regex = ipv4_addr_regex | ipv6_addr_regex;
 ## Returns: T if every element is between 0 and 255, inclusive, else F.
 function has_valid_octets(octets: string_vec): bool
 	{
-	local num = 0;
 	for ( i in octets )
 		{
-		num = to_count(octets[i]);
-		if ( num < 0 || 255 < num )
+		local num = to_count(octets[i]);
+		if ( 255 < num )
 			return F;
 		}
 	return T;