diff --git a/src/Expr.cc b/src/Expr.cc
index 6c6b94b868..10a149d0e4 100644
--- a/src/Expr.cc
+++ b/src/Expr.cc
@@ -2002,7 +2002,7 @@ void RefExpr::Assign(Frame* f, IntrusivePtr<Val> v)
 
 AssignExpr::AssignExpr(IntrusivePtr<Expr> arg_op1, IntrusivePtr<Expr> arg_op2,
                        bool arg_is_init, IntrusivePtr<Val> arg_val,
-                       attr_list* arg_attrs)
+                       const IntrusivePtr<Attributes>& attrs)
 	: BinaryExpr(EXPR_ASSIGN, arg_is_init ?
 	             std::move(arg_op1) : arg_op1->MakeLvalue(),
 	             std::move(arg_op2))
@@ -2027,14 +2027,14 @@ AssignExpr::AssignExpr(IntrusivePtr<Expr> arg_op1, IntrusivePtr<Expr> arg_op2,
 
 	// We discard the status from TypeCheck since it has already
 	// generated error messages.
-	(void) TypeCheck(arg_attrs);
+	(void) TypeCheck(attrs);
 
 	val = std::move(arg_val);
 
 	SetLocationInfo(op1->GetLocationInfo(), op2->GetLocationInfo());
 	}
 
-bool AssignExpr::TypeCheck(attr_list* attrs)
+bool AssignExpr::TypeCheck(const IntrusivePtr<Attributes>& attrs)
 	{
 	TypeTag bt1 = op1->GetType()->Tag();
 	TypeTag bt2 = op2->GetType()->Tag();
@@ -2069,22 +2069,19 @@ bool AssignExpr::TypeCheck(attr_list* attrs)
 
 	if ( bt1 == TYPE_TABLE && op2->Tag() == EXPR_LIST )
 		{
-		attr_list* attr_copy = nullptr;
+		std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr_copy;
 
 		if ( attrs )
-			{
-			attr_copy = new attr_list(attrs->length());
-			std::copy(attrs->begin(), attrs->end(), std::back_inserter(*attr_copy));
-			}
+			attr_copy = std::make_unique<std::vector<IntrusivePtr<Attr>>>(attrs->Attrs());
 
 		bool empty_list_assignment = (op2->AsListExpr()->Exprs().empty());
 
 		if ( op1->GetType()->IsSet() )
 			op2 = make_intrusive<SetConstructorExpr>(
-			        IntrusivePtr{NewRef{}, op2->AsListExpr()}, attr_copy);
+			        cast_intrusive<ListExpr>(op2), std::move(attr_copy));
 		else
 			op2 = make_intrusive<TableConstructorExpr>(
-			        IntrusivePtr{NewRef{}, op2->AsListExpr()}, attr_copy);
+			        cast_intrusive<ListExpr>(op2), std::move(attr_copy));
 
 		if ( ! empty_list_assignment && ! same_type(op1->GetType(), op2->GetType()) )
 			{
@@ -2166,23 +2163,19 @@ bool AssignExpr::TypeCheck(attr_list* attrs)
 					return false;
 					}
 
-				attr_list* attr_copy = nullptr;
+				std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr_copy;
 
-				if ( sce->Attrs() )
+
+				if ( sce->GetAttrs() )
 					{
-					const auto& a = sce->Attrs()->Attrs();
-					attr_copy = new attr_list(a.size());
-
-					for ( const auto& attr : a )
-						{
-						::Ref(attr.get());
-						attrs->push_back(attr.get());
-						}
+					const auto& a = sce->GetAttrs()->Attrs();
+					attr_copy = std::make_unique<std::vector<IntrusivePtr<Attr>>>(a);
 					}
 
 				int errors_before = reporter->Errors();
 				op2 = make_intrusive<SetConstructorExpr>(
-				        IntrusivePtr{NewRef{}, ctor_list}, attr_copy,
+				        IntrusivePtr{NewRef{}, ctor_list},
+				        std::move(attr_copy),
 				        op1->GetType());
 				int errors_after = reporter->Errors();
 
@@ -2286,7 +2279,7 @@ void AssignExpr::EvalIntoAggregate(const BroType* t, Val* aggr, Frame* f) const
 	if ( IsError() )
 		return;
 
-	TypeDecl td(nullptr, nullptr);
+	TypeDecl td;
 
 	if ( IsRecordElement(&td) )
 		{
@@ -2341,7 +2334,7 @@ IntrusivePtr<Val> AssignExpr::InitVal(const BroType* t, IntrusivePtr<Val> aggr)
 	if ( IsError() )
 		return nullptr;
 
-	TypeDecl td(nullptr, nullptr);
+	TypeDecl td;
 
 	if ( IsRecordElement(&td) )
 		{
@@ -2997,7 +2990,7 @@ RecordConstructorExpr::RecordConstructorExpr(IntrusivePtr<ListExpr> constructor_
 		FieldAssignExpr* field = (FieldAssignExpr*) e;
 		const auto& field_type = field->GetType();
 		char* field_name = copy_string(field->FieldName());
-		record_types->push_back(new TypeDecl(field_type, field_name));
+		record_types->push_back(new TypeDecl(field_name, field_type));
 		}
 
 	SetType(make_intrusive<RecordType>(record_types));
@@ -3051,10 +3044,9 @@ void RecordConstructorExpr::ExprDescribe(ODesc* d) const
 	}
 
 TableConstructorExpr::TableConstructorExpr(IntrusivePtr<ListExpr> constructor_list,
-                                           attr_list* arg_attrs,
+                                           std::unique_ptr<std::vector<IntrusivePtr<Attr>>> arg_attrs,
                                            IntrusivePtr<BroType> arg_type)
-	: UnaryExpr(EXPR_TABLE_CONSTRUCTOR, std::move(constructor_list)),
-	  attrs(nullptr)
+	: UnaryExpr(EXPR_TABLE_CONSTRUCTOR, std::move(constructor_list))
 	{
 	if ( IsError() )
 		return;
@@ -3088,15 +3080,7 @@ TableConstructorExpr::TableConstructorExpr(IntrusivePtr<ListExpr> constructor_li
 		}
 
 	if ( arg_attrs )
-		{
-		std::vector<IntrusivePtr<Attr>> attrv;
-
-		for ( auto& a : *arg_attrs )
-			attrv.emplace_back(AdoptRef{}, a);
-
-		attrs = new Attributes(std::move(attrv), type, false, false);
-		delete arg_attrs;
-		}
+		attrs = make_intrusive<Attributes>(std::move(*arg_attrs), type, false, false);
 
 	const auto& indices = type->AsTableType()->GetIndices()->Types();
 	const expr_list& cle = op->AsListExpr()->Exprs();
@@ -3144,8 +3128,7 @@ IntrusivePtr<Val> TableConstructorExpr::Eval(Frame* f) const
 	if ( IsError() )
 		return nullptr;
 
-	auto aggr = make_intrusive<TableVal>(GetType<TableType>(),
-	                                     IntrusivePtr{NewRef{}, attrs});
+	auto aggr = make_intrusive<TableVal>(GetType<TableType>(), attrs);
 	const expr_list& exprs = op->AsListExpr()->Exprs();
 
 	for ( const auto& expr : exprs )
@@ -3165,7 +3148,7 @@ IntrusivePtr<Val> TableConstructorExpr::InitVal(const BroType* t, IntrusivePtr<V
 
 	auto tval = aggr ?
 	        IntrusivePtr<TableVal>{AdoptRef{}, aggr.release()->AsTableVal()} :
-	        make_intrusive<TableVal>(std::move(tt), IntrusivePtr{NewRef{}, attrs});
+	        make_intrusive<TableVal>(std::move(tt), attrs);
 	const expr_list& exprs = op->AsListExpr()->Exprs();
 
 	for ( const auto& expr : exprs )
@@ -3182,10 +3165,9 @@ void TableConstructorExpr::ExprDescribe(ODesc* d) const
 	}
 
 SetConstructorExpr::SetConstructorExpr(IntrusivePtr<ListExpr> constructor_list,
-                                       attr_list* arg_attrs,
+                                       std::unique_ptr<std::vector<IntrusivePtr<Attr>>> arg_attrs,
                                        IntrusivePtr<BroType> arg_type)
-	: UnaryExpr(EXPR_SET_CONSTRUCTOR, std::move(constructor_list)),
-	  attrs(nullptr)
+	: UnaryExpr(EXPR_SET_CONSTRUCTOR, std::move(constructor_list))
 	{
 	if ( IsError() )
 		return;
@@ -3216,15 +3198,7 @@ SetConstructorExpr::SetConstructorExpr(IntrusivePtr<ListExpr> constructor_list,
 		SetError("values in set(...) constructor do not specify a set");
 
 	if ( arg_attrs )
-		{
-		std::vector<IntrusivePtr<Attr>> attrv;
-
-		for ( auto& a : *arg_attrs )
-			attrv.emplace_back(AdoptRef{}, a);
-
-		attrs = new Attributes(std::move(attrv), type, false, false);
-		delete arg_attrs;
-		}
+		attrs = make_intrusive<Attributes>(std::move(*arg_attrs), type, false, false);
 
 	const auto& indices = type->AsTableType()->GetIndices()->Types();
 	expr_list& cle = op->AsListExpr()->Exprs();
@@ -3264,7 +3238,7 @@ IntrusivePtr<Val> SetConstructorExpr::Eval(Frame* f) const
 		return nullptr;
 
 	auto aggr = make_intrusive<TableVal>(IntrusivePtr{NewRef{}, type->AsTableType()},
-	                                     IntrusivePtr{NewRef{}, attrs});
+	                                     attrs);
 	const expr_list& exprs = op->AsListExpr()->Exprs();
 
 	for ( const auto& expr : exprs )
@@ -3285,7 +3259,7 @@ IntrusivePtr<Val> SetConstructorExpr::InitVal(const BroType* t, IntrusivePtr<Val
 	auto tt = GetType<TableType>();
 	auto tval = aggr ?
 	        IntrusivePtr<TableVal>{AdoptRef{}, aggr.release()->AsTableVal()} :
-	        make_intrusive<TableVal>(std::move(tt), IntrusivePtr{NewRef{}, attrs});
+	        make_intrusive<TableVal>(std::move(tt), attrs);
 	const expr_list& exprs = op->AsListExpr()->Exprs();
 
 	for ( const auto& e : exprs )
diff --git a/src/Expr.h b/src/Expr.h
index 28c7d909fe..cd09920522 100644
--- a/src/Expr.h
+++ b/src/Expr.h
@@ -519,7 +519,8 @@ public:
 	// If val is given, evaluating this expression will always yield the val
 	// yet still perform the assignment.  Used for triggers.
 	AssignExpr(IntrusivePtr<Expr> op1, IntrusivePtr<Expr> op2, bool is_init,
-	           IntrusivePtr<Val> val = nullptr, attr_list* attrs = nullptr);
+	           IntrusivePtr<Val> val = nullptr,
+	           const IntrusivePtr<Attributes>& attrs = nullptr);
 
 	IntrusivePtr<Val> Eval(Frame* f) const override;
 	void EvalIntoAggregate(const BroType* t, Val* aggr, Frame* f) const override;
@@ -529,7 +530,7 @@ public:
 	bool IsPure() const override;
 
 protected:
-	bool TypeCheck(attr_list* attrs = nullptr);
+	bool TypeCheck(const IntrusivePtr<Attributes>& attrs = nullptr);
 	bool TypeCheckArithmetics(TypeTag bt1, TypeTag bt2);
 
 	bool is_init;
@@ -630,11 +631,15 @@ protected:
 
 class TableConstructorExpr final : public UnaryExpr {
 public:
-	TableConstructorExpr(IntrusivePtr<ListExpr> constructor_list, attr_list* attrs,
+	TableConstructorExpr(IntrusivePtr<ListExpr> constructor_list,
+	                     std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs,
 	                     IntrusivePtr<BroType> arg_type = nullptr);
-	~TableConstructorExpr() override { Unref(attrs); }
 
-	Attributes* Attrs() { return attrs; }
+	[[deprecated("Remove in v4.1.  Use GetAttrs().")]]
+	Attributes* Attrs() { return attrs.get(); }
+
+	const IntrusivePtr<Attributes>& GetAttrs() const
+		{ return attrs; }
 
 	IntrusivePtr<Val> Eval(Frame* f) const override;
 
@@ -643,16 +648,20 @@ protected:
 
 	void ExprDescribe(ODesc* d) const override;
 
-	Attributes* attrs;
+	IntrusivePtr<Attributes> attrs;
 };
 
 class SetConstructorExpr final : public UnaryExpr {
 public:
-	SetConstructorExpr(IntrusivePtr<ListExpr> constructor_list, attr_list* attrs,
+	SetConstructorExpr(IntrusivePtr<ListExpr> constructor_list,
+	                   std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs,
 	                   IntrusivePtr<BroType> arg_type = nullptr);
-	~SetConstructorExpr() override { Unref(attrs); }
 
-	Attributes* Attrs() { return attrs; }
+	[[deprecated("Remove in v4.1.  Use GetAttrs().")]]
+	Attributes* Attrs() { return attrs.get(); }
+
+	const IntrusivePtr<Attributes>& GetAttrs() const
+		{ return attrs; }
 
 	IntrusivePtr<Val> Eval(Frame* f) const override;
 
@@ -661,7 +670,7 @@ protected:
 
 	void ExprDescribe(ODesc* d) const override;
 
-	Attributes* attrs;
+	IntrusivePtr<Attributes> attrs;
 };
 
 class VectorConstructorExpr final : public UnaryExpr {
diff --git a/src/Func.cc b/src/Func.cc
index 18875ff742..ae557bee67 100644
--- a/src/Func.cc
+++ b/src/Func.cc
@@ -840,7 +840,7 @@ bool check_built_in_call(BuiltinFunc* f, CallExpr* call)
 
 // Gets a function's priority from its Scope's attributes. Errors if it sees any
 // problems.
-static int get_func_priority(const attr_list& attrs)
+static int get_func_priority(const std::vector<IntrusivePtr<Attr>>& attrs)
 	{
 	int priority = 0;
 
@@ -883,7 +883,7 @@ function_ingredients::function_ingredients(IntrusivePtr<Scope> scope, IntrusiveP
 	this->scope = std::move(scope);
 	id = {NewRef{}, this->scope->ScopeID()};
 
-	auto attrs = this->scope->Attrs();
+	const auto& attrs = this->scope->Attrs();
 
 	priority = (attrs ? get_func_priority(*attrs) : 0);
 	this->body = std::move(body);
diff --git a/src/Scope.cc b/src/Scope.cc
index 9378b477df..c7eaf9fdca 100644
--- a/src/Scope.cc
+++ b/src/Scope.cc
@@ -15,10 +15,10 @@ typedef PList<Scope> scope_list;
 static scope_list scopes;
 static Scope* top_scope;
 
-Scope::Scope(IntrusivePtr<ID> id, attr_list* al)
-	: scope_id(std::move(id))
+Scope::Scope(IntrusivePtr<ID> id,
+             std::unique_ptr<std::vector<IntrusivePtr<Attr>>> al)
+	: scope_id(std::move(id)), attrs(std::move(al))
 	{
-	attrs = al;
 	return_type = nullptr;
 
 	inits = new id_list;
@@ -39,14 +39,6 @@ Scope::Scope(IntrusivePtr<ID> id, attr_list* al)
 
 Scope::~Scope()
 	{
-	if ( attrs )
-		{
-		for ( const auto& attr : *attrs )
-			Unref(attr);
-
-		delete attrs;
-		}
-
 	if ( inits )
 		{
 		for ( const auto& i : *inits )
@@ -210,9 +202,10 @@ void push_existing_scope(Scope* scope)
 	scopes.push_back(scope);
 	}
 
-void push_scope(IntrusivePtr<ID> id, attr_list* attrs)
+void push_scope(IntrusivePtr<ID> id,
+                std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs)
 	{
-	top_scope = new Scope(std::move(id), attrs);
+	top_scope = new Scope(std::move(id), std::move(attrs));
 	scopes.push_back(top_scope);
 	}
 
diff --git a/src/Scope.h b/src/Scope.h
index 5201d1b5e0..93c20213ca 100644
--- a/src/Scope.h
+++ b/src/Scope.h
@@ -19,7 +19,8 @@ class ListVal;
 
 class Scope : public BroObj {
 public:
-	explicit Scope(IntrusivePtr<ID> id, attr_list* al);
+	explicit Scope(IntrusivePtr<ID> id,
+	               std::unique_ptr<std::vector<IntrusivePtr<Attr>>> al);
 	~Scope() override;
 
 	const IntrusivePtr<ID>& Find(std::string_view name) const;
@@ -35,7 +36,10 @@ public:
 	IntrusivePtr<ID> Remove(std::string_view name);
 
 	ID* ScopeID() const		{ return scope_id.get(); }
-	attr_list* Attrs() const	{ return attrs; }
+
+	const std::unique_ptr<std::vector<IntrusivePtr<Attr>>>& Attrs() const
+		{ return attrs; }
+
 	BroType* ReturnType() const	{ return return_type.get(); }
 
 	size_t Length() const		{ return local.size(); }
@@ -56,7 +60,7 @@ public:
 
 protected:
 	IntrusivePtr<ID> scope_id;
-	attr_list* attrs;
+	std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs;
 	IntrusivePtr<BroType> return_type;
 	std::map<std::string, IntrusivePtr<ID>, std::less<>> local;
 	id_list* inits;
@@ -74,7 +78,8 @@ extern const IntrusivePtr<ID>& lookup_ID(const char* name, const char* module,
 extern IntrusivePtr<ID> install_ID(const char* name, const char* module_name,
                                    bool is_global, bool is_export);
 
-extern void push_scope(IntrusivePtr<ID> id, attr_list* attrs);
+extern void push_scope(IntrusivePtr<ID> id,
+                       std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs);
 extern void push_existing_scope(Scope* scope);
 
 // Returns the one popped off.
diff --git a/src/Type.cc b/src/Type.cc
index 4e2d3790ba..382da6cb8c 100644
--- a/src/Type.cc
+++ b/src/Type.cc
@@ -607,21 +607,12 @@ std::optional<FuncType::Prototype> FuncType::FindPrototype(const RecordType& arg
 	return {};
 	}
 
-TypeDecl::TypeDecl(IntrusivePtr<BroType> t, const char* i, attr_list* arg_attrs, bool in_record)
+TypeDecl::TypeDecl(const char* i, IntrusivePtr<BroType> t,
+                   IntrusivePtr<Attributes> arg_attrs)
 	: type(std::move(t)),
+	  attrs(std::move(arg_attrs)),
 	  id(i)
-	{
-	if ( arg_attrs )
-		{
-		std::vector<IntrusivePtr<Attr>> attrv;
-
-		for ( auto& a : *arg_attrs )
-			attrv.emplace_back(AdoptRef{}, a);
-
-		attrs = make_intrusive<Attributes>(std::move(attrv), type, in_record, false);
-		delete arg_attrs;
-		}
-	}
+	{}
 
 TypeDecl::TypeDecl(const TypeDecl& other)
 	{
@@ -832,35 +823,24 @@ IntrusivePtr<TableVal> RecordType::GetRecordFieldsVal(const RecordVal* rv) const
 	return rval;
 	}
 
-const char* RecordType::AddFields(type_decl_list* others, attr_list* attr)
+const char* RecordType::AddFields(const type_decl_list& others,
+                                  bool add_log_attr)
 	{
 	assert(types);
 
 	bool log = false;
 
-	if ( attr )
-		{
-		for ( const auto& at : *attr )
-			{
-			if ( at->Tag() == ATTR_LOG )
-				log = true;
-			}
-		}
-
-	for ( const auto& td : *others )
+	for ( const auto& td : others )
 		{
 		if ( ! td->GetAttr(ATTR_DEFAULT) && ! td->GetAttr(ATTR_OPTIONAL) )
-			{
-			delete others;
 			return "extension field must be &optional or have &default";
-			}
 		}
 
 	TableVal::SaveParseTimeTableState(this);
 
-	for ( const auto& td : *others )
+	for ( const auto& td : others )
 		{
-		if ( log )
+		if ( add_log_attr )
 			{
 			if ( ! td->attrs )
 				td->attrs = make_intrusive<Attributes>(td->type, true, false);
@@ -871,8 +851,6 @@ const char* RecordType::AddFields(type_decl_list* others, attr_list* attr)
 		types->push_back(td);
 		}
 
-	delete others;
-
 	num_fields = types->length();
 	RecordVal::ResizeParseTimeRecords(this);
 	TableVal::RebuildParseTimeTables();
@@ -1878,7 +1856,7 @@ IntrusivePtr<BroType> merge_types(const IntrusivePtr<BroType>& arg_t1,
 				return nullptr;
 				}
 
-			tdl3->push_back(new TypeDecl(std::move(tdl3_i), copy_string(td1->id)));
+			tdl3->push_back(new TypeDecl(copy_string(td1->id), std::move(tdl3_i)));
 			}
 
 		return make_intrusive<RecordType>(tdl3);
diff --git a/src/Type.h b/src/Type.h
index bb5f8fc0ba..80cd024ce5 100644
--- a/src/Type.h
+++ b/src/Type.h
@@ -562,7 +562,8 @@ protected:
 
 class TypeDecl final {
 public:
-	TypeDecl(IntrusivePtr<BroType> t, const char* i, attr_list* attrs = nullptr, bool in_record = false);
+	TypeDecl() = default;
+	TypeDecl(const char* i, IntrusivePtr<BroType> t, IntrusivePtr<Attributes> attrs = nullptr);
 	TypeDecl(const TypeDecl& other);
 	~TypeDecl();
 
@@ -577,7 +578,7 @@ public:
 
 	IntrusivePtr<BroType> type;
 	IntrusivePtr<Attributes> attrs;
-	const char* id;
+	const char* id = nullptr;
 };
 
 typedef PList<TypeDecl> type_decl_list;
@@ -656,9 +657,9 @@ public:
 	 */
 	IntrusivePtr<TableVal> GetRecordFieldsVal(const RecordVal* rv = nullptr) const;
 
-	// Returns 0 if all is ok, otherwise a pointer to an error message.
-	// Takes ownership of list.
-	const char* AddFields(type_decl_list* types, attr_list* attr);
+	// Returns null if all is ok, otherwise a pointer to an error message.
+	const char* AddFields(const type_decl_list& types,
+	                      bool add_log_attr = false);
 
 	void Describe(ODesc* d) const override;
 	void DescribeReST(ODesc* d, bool roles_only = false) const override;
diff --git a/src/Var.cc b/src/Var.cc
index 5449fe939e..8e64f27b99 100644
--- a/src/Var.cc
+++ b/src/Var.cc
@@ -30,7 +30,8 @@ static IntrusivePtr<Val> init_val(Expr* init, const BroType* t,
 		}
 	}
 
-static bool add_prototype(ID* id, BroType* t, attr_list* attrs,
+static bool add_prototype(ID* id, BroType* t,
+                          std::vector<IntrusivePtr<Attr>>* attrs,
                           const IntrusivePtr<Expr>& init)
 	{
 	if ( ! IsFunc(id->GetType()->Tag()) )
@@ -108,7 +109,9 @@ static bool add_prototype(ID* id, BroType* t, attr_list* attrs,
 	}
 
 static void make_var(ID* id, IntrusivePtr<BroType> t, init_class c,
-                     IntrusivePtr<Expr> init, attr_list* attr, decl_type dt,
+                     IntrusivePtr<Expr> init,
+                     std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr,
+                     decl_type dt,
                      bool do_init)
 	{
 	if ( id->GetType() )
@@ -123,7 +126,7 @@ static void make_var(ID* id, IntrusivePtr<BroType> t, init_class c,
 		else if ( dt != VAR_REDEF || init || ! attr )
 			{
 			if ( IsFunc(id->GetType()->Tag()) )
-				add_prototype(id, t.get(), attr, init);
+				add_prototype(id, t.get(), attr.get(), init);
 			else
 				id->Error("already defined", init.get());
 
@@ -196,14 +199,7 @@ static void make_var(ID* id, IntrusivePtr<BroType> t, init_class c,
 	id->SetType(t);
 
 	if ( attr )
-		{
-		std::vector<IntrusivePtr<Attr>> attrv;
-
-		for ( auto& a : *attr)
-			attrv.emplace_back(AdoptRef{}, a);
-
-		id->AddAttrs(make_intrusive<Attributes>(std::move(attrv), t, false, id->IsGlobal()));
-		}
+		id->AddAttrs(make_intrusive<Attributes>(std::move(*attr), t, false, id->IsGlobal()));
 
 	if ( init )
 		{
@@ -211,16 +207,16 @@ static void make_var(ID* id, IntrusivePtr<BroType> t, init_class c,
 		case EXPR_TABLE_CONSTRUCTOR:
 			{
 			TableConstructorExpr* ctor = (TableConstructorExpr*) init.get();
-			if ( ctor->Attrs() )
-				id->AddAttrs({NewRef{}, ctor->Attrs()});
+			if ( ctor->GetAttrs() )
+				id->AddAttrs(ctor->GetAttrs());
 			}
 			break;
 
 		case EXPR_SET_CONSTRUCTOR:
 			{
 			SetConstructorExpr* ctor = (SetConstructorExpr*) init.get();
-			if ( ctor->Attrs() )
-				id->AddAttrs({NewRef{}, ctor->Attrs()});
+			if ( ctor->GetAttrs() )
+				id->AddAttrs(ctor->GetAttrs());
 			}
 			break;
 
@@ -312,16 +308,19 @@ static void make_var(ID* id, IntrusivePtr<BroType> t, init_class c,
 
 
 void add_global(ID* id, IntrusivePtr<BroType> t, init_class c,
-                IntrusivePtr<Expr> init, attr_list* attr, decl_type dt)
+                IntrusivePtr<Expr> init,
+                std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr,
+                decl_type dt)
 	{
-	make_var(id, std::move(t), c, std::move(init), attr, dt, true);
+	make_var(id, std::move(t), c, std::move(init), std::move(attr), dt, true);
 	}
 
 IntrusivePtr<Stmt> add_local(IntrusivePtr<ID> id, IntrusivePtr<BroType> t,
                              init_class c, IntrusivePtr<Expr> init,
-                             attr_list* attr, decl_type dt)
+                             std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr,
+                             decl_type dt)
 	{
-	make_var(id.get(), std::move(t), c, init, attr, dt, false);
+	make_var(id.get(), std::move(t), c, init, std::move(attr), dt, false);
 
 	if ( init )
 		{
@@ -333,20 +332,9 @@ IntrusivePtr<Stmt> add_local(IntrusivePtr<ID> id, IntrusivePtr<BroType> t,
 		        *init->GetLocationInfo() : no_location;
 
 		auto name_expr = make_intrusive<NameExpr>(id, dt == VAR_CONST);
-		attr_list* attrs = nullptr;
-
-		if ( id->GetAttrs() )
-			{
-			attrs = new attr_list(id->GetAttrs()->Attrs().size());
-
-			for ( const auto& a : id->GetAttrs()->Attrs() )
-				attrs->push_back(a.get());
-			}
-
 		auto assign_expr = make_intrusive<AssignExpr>(std::move(name_expr),
 		                                              std::move(init), 0,
-		                                              nullptr, attrs);
-		delete attrs;
+		                                              nullptr, id->GetAttrs());
 		auto stmt = make_intrusive<ExprStmt>(std::move(assign_expr));
 		stmt->SetLocationInfo(&location);
 		return stmt;
@@ -369,7 +357,8 @@ extern IntrusivePtr<Expr> add_and_assign_local(IntrusivePtr<ID> id,
 	                                  false, std::move(val));
 	}
 
-void add_type(ID* id, IntrusivePtr<BroType> t, attr_list* attr)
+void add_type(ID* id, IntrusivePtr<BroType> t,
+              std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr)
 	{
 	std::string new_type_name = id->Name();
 	std::string old_type_name = t->GetName();
@@ -394,15 +383,7 @@ void add_type(ID* id, IntrusivePtr<BroType> t, attr_list* attr)
 	id->MakeType();
 
 	if ( attr )
-		{
-		std::vector<IntrusivePtr<Attr>> attrv;
-
-		for ( auto& a : *attr )
-			attrv.emplace_back(AdoptRef{}, a);
-
-		id->SetAttrs(make_intrusive<Attributes>(std::move(attrv), tnew, false, false));
-		delete attr;
-		}
+		id->SetAttrs(make_intrusive<Attributes>(std::move(*attr), tnew, false, false));
 	}
 
 static void transfer_arg_defaults(RecordType* args, RecordType* recv)
@@ -430,23 +411,18 @@ static void transfer_arg_defaults(RecordType* args, RecordType* recv)
 		}
 	}
 
-static Attr* find_attr(const attr_list* al, attr_tag tag)
+static Attr* find_attr(const std::vector<IntrusivePtr<Attr>>* al, attr_tag tag)
 	{
 	if ( ! al )
 		return nullptr;
 
-	for ( int i = 0; i < al->length(); ++i )
+	for ( size_t i = 0; i < al->size(); ++i )
 		if ( (*al)[i]->Tag() == tag )
-			return (*al)[i];
+			return (*al)[i].get();
 
 	return nullptr;
 	}
 
-static bool has_attr(const attr_list* al, attr_tag tag)
-	{
-	return find_attr(al, tag) != nullptr;
-	}
-
 static std::optional<FuncType::Prototype> func_type_check(const FuncType* decl, const FuncType* impl)
 	{
 	if ( decl->Flavor() != impl->Flavor() )
@@ -483,7 +459,8 @@ static bool canonical_arg_types_match(const FuncType* decl, const FuncType* impl
 	}
 
 void begin_func(ID* id, const char* module_name, function_flavor flavor,
-                bool is_redef, IntrusivePtr<FuncType> t, attr_list* attrs)
+                bool is_redef, IntrusivePtr<FuncType> t,
+                std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs)
 	{
 	if ( flavor == FUNC_FLAVOR_EVENT )
 		{
@@ -580,7 +557,7 @@ void begin_func(ID* id, const char* module_name, function_flavor flavor,
 	else
 		id->SetType(t);
 
-	push_scope({NewRef{}, id}, attrs);
+	push_scope({NewRef{}, id}, std::move(attrs));
 
 	const auto& args = t->Params();
 	int num_args = args->NumFields();
@@ -600,7 +577,8 @@ void begin_func(ID* id, const char* module_name, function_flavor flavor,
 			arg_id->SetOffset(prototype->offsets[i]);
 		}
 
-	if ( Attr* depr_attr = find_attr(attrs, ATTR_DEPRECATED) )
+	if ( Attr* depr_attr = find_attr(current_scope()->Attrs().get(),
+	                                 ATTR_DEPRECATED) )
 		id->MakeDeprecated(depr_attr->GetExpr());
 	}
 
diff --git a/src/Var.h b/src/Var.h
index 67d8928639..13fedce1dc 100644
--- a/src/Var.h
+++ b/src/Var.h
@@ -17,23 +17,30 @@ class ListVal;
 
 typedef enum { VAR_REGULAR, VAR_CONST, VAR_REDEF, VAR_OPTION, } decl_type;
 
-extern void add_global(ID* id, IntrusivePtr<BroType> t, init_class c,
-                       IntrusivePtr<Expr> init, attr_list* attr, decl_type dt);
+extern void add_global(ID* id,
+                       IntrusivePtr<BroType> t,
+                       init_class c,
+                       IntrusivePtr<Expr> init,
+                       std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr,
+                       decl_type dt);
 
 extern IntrusivePtr<Stmt> add_local(IntrusivePtr<ID> id,
-                                    IntrusivePtr<BroType> t, init_class c,
-                                    IntrusivePtr<Expr> init, attr_list* attr,
+                                    IntrusivePtr<BroType> t,
+                                    init_class c,
+                                    IntrusivePtr<Expr> init,
+                                    std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr,
                                     decl_type dt);
 
 extern IntrusivePtr<Expr> add_and_assign_local(IntrusivePtr<ID> id,
                                                IntrusivePtr<Expr> init,
                                                IntrusivePtr<Val> val = nullptr);
 
-extern void add_type(ID* id, IntrusivePtr<BroType> t, attr_list* attr);
+extern void add_type(ID* id, IntrusivePtr<BroType> t,
+                     std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attr);
 
 extern void begin_func(ID* id, const char* module_name, function_flavor flavor,
                        bool is_redef, IntrusivePtr<FuncType> t,
-                       attr_list* attrs = nullptr);
+                       std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs = nullptr);
 
 extern void end_func(IntrusivePtr<Stmt> body);
 
diff --git a/src/parse.y b/src/parse.y
index 6930c7e5e9..1a3aa37424 100644
--- a/src/parse.y
+++ b/src/parse.y
@@ -167,36 +167,8 @@ static void parser_redef_enum (ID *id)
 		}
 	}
 
-static type_decl_list* copy_type_decl_list(type_decl_list* tdl)
-	{
-	if ( ! tdl )
-		return 0;
-
-	type_decl_list* rval = new type_decl_list();
-
-	for ( const auto& td : *tdl )
-		rval->push_back(new TypeDecl(*td));
-
-	return rval;
-	}
-
-static attr_list* copy_attr_list(attr_list* al)
-	{
-	if ( ! al )
-		return 0;
-
-	attr_list* rval = new attr_list();
-
-	for ( const auto& a : *al )
-		{
-		::Ref(a);
-		rval->push_back(a);
-		}
-
-	return rval;
-	}
-
-static void extend_record(ID* id, type_decl_list* fields, attr_list* attrs)
+static void extend_record(ID* id, std::unique_ptr<type_decl_list> fields,
+                          std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs)
 	{
 	std::set<BroType*> types = BroType::GetAliases(id->Name());
 
@@ -206,17 +178,19 @@ static void extend_record(ID* id, type_decl_list* fields, attr_list* attrs)
 		return;
 		}
 
-	for ( std::set<BroType*>::const_iterator it = types.begin(); it != types.end(); )
-		{
-		RecordType* add_to = (*it)->AsRecordType();
-		const char* error = 0;
-		++it;
+	bool add_log_attr = false;
 
-		if ( it == types.end() )
-			error = add_to->AddFields(fields, attrs);
-		else
-			error = add_to->AddFields(copy_type_decl_list(fields),
-			                          copy_attr_list(attrs));
+	if ( attrs )
+		for ( const auto& at : *attrs )
+			if ( at->Tag() == ATTR_LOG )
+				{
+				add_log_attr = true;
+				break;
+				}
+
+	for ( auto t : types )
+		{
+		auto error = t->AsRecordType()->AddFields(*fields, add_log_attr);
 
 		if ( error )
 			{
@@ -226,6 +200,19 @@ static void extend_record(ID* id, type_decl_list* fields, attr_list* attrs)
 		}
 	}
 
+static IntrusivePtr<Attributes>
+make_attributes(std::vector<IntrusivePtr<Attr>>* attrs,
+                IntrusivePtr<BroType> t, bool in_record, bool is_global)
+	{
+	if ( ! attrs )
+		return nullptr;
+
+	auto rval = make_intrusive<Attributes>(std::move(*attrs), std::move(t),
+	                                       in_record, is_global);
+	delete attrs;
+	return rval;
+	}
+
 static bool expr_is_table_type_name(const Expr* expr)
 	{
 	if ( expr->Tag() != EXPR_NAME )
@@ -264,7 +251,7 @@ static bool expr_is_table_type_name(const Expr* expr)
 	Case* c_case;
 	case_list* case_l;
 	Attr* attr;
-	attr_list* attr_l;
+	std::vector<IntrusivePtr<Attr>>* attr_l;
 	attr_tag attrtag;
 }
 
@@ -576,13 +563,15 @@ expr:
 		opt_attr
 			{ // the ++in_init fixes up the parsing of "[x] = y"
 			set_location(@1, @5);
-			$$ = new TableConstructorExpr({AdoptRef{}, $4}, $7);
+			std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs{$7};
+			$$ = new TableConstructorExpr({AdoptRef{}, $4}, std::move(attrs));
 			}
 
 	|	TOK_SET '(' opt_expr_list ')' opt_attr
 			{
 			set_location(@1, @4);
-			$$ = new SetConstructorExpr({AdoptRef{}, $3}, $5);
+			std::unique_ptr<std::vector<IntrusivePtr<Attr>>> attrs{$5};
+			$$ = new SetConstructorExpr({AdoptRef{}, $3}, std::move(attrs));
 			}
 
 	|	TOK_VECTOR '(' opt_expr_list ')'
@@ -1046,7 +1035,8 @@ type_decl:
 		TOK_ID ':' type opt_attr ';'
 			{
 			set_location(@1, @4);
-			$$ = new TypeDecl({AdoptRef{}, $3}, $1, $4, (in_record > 0));
+			auto attrs = make_attributes($4, {NewRef{}, $3}, in_record > 0, false);
+			$$ = new TypeDecl($1, {AdoptRef{}, $3}, std::move(attrs));
 
 			if ( in_record > 0 && cur_decl_type_id )
 				zeekygen_mgr->RecordField(cur_decl_type_id, $$, ::filename);
@@ -1075,7 +1065,8 @@ formal_args_decl:
 		TOK_ID ':' type opt_attr
 			{
 			set_location(@1, @4);
-			$$ = new TypeDecl({AdoptRef{}, $3}, $1, $4, true);
+			auto attrs = make_attributes($4, {NewRef{}, $3}, true, false);
+			$$ = new TypeDecl($1, {AdoptRef{}, $3}, std::move(attrs));
 			}
 	;
 
@@ -1092,21 +1083,27 @@ decl:
 	|	TOK_GLOBAL def_global_id opt_type init_class opt_init opt_attr ';'
 			{
 			IntrusivePtr id{AdoptRef{}, $2};
-			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5}, $6, VAR_REGULAR);
+			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5},
+			           std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			           VAR_REGULAR);
 			zeekygen_mgr->Identifier(std::move(id));
 			}
 
 	|	TOK_OPTION def_global_id opt_type init_class opt_init opt_attr ';'
 			{
 			IntrusivePtr id{AdoptRef{}, $2};
-			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5}, $6, VAR_OPTION);
+			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5},
+			           std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			           VAR_OPTION);
 			zeekygen_mgr->Identifier(std::move(id));
 			}
 
 	|	TOK_CONST def_global_id opt_type init_class opt_init opt_attr ';'
 			{
 			IntrusivePtr id{AdoptRef{}, $2};
-			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5}, $6, VAR_CONST);
+			add_global(id.get(), {AdoptRef{}, $3}, $4, {AdoptRef{}, $5},
+			           std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			           VAR_CONST);
 			zeekygen_mgr->Identifier(std::move(id));
 			}
 
@@ -1114,7 +1111,9 @@ decl:
 			{
 			IntrusivePtr id{AdoptRef{}, $2};
 			IntrusivePtr<Expr> init{AdoptRef{}, $5};
-			add_global(id.get(), {AdoptRef{}, $3}, $4, init, $6, VAR_REDEF);
+			add_global(id.get(), {AdoptRef{}, $3}, $4, init,
+			           std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			           VAR_REDEF);
 			zeekygen_mgr->Redef(id.get(), ::filename, $4, std::move(init));
 			}
 
@@ -1138,7 +1137,8 @@ decl:
 			if ( ! $3->GetType() )
 				$3->Error("unknown identifier");
 			else
-				extend_record($3, $8, $11);
+				extend_record($3, std::unique_ptr<type_decl_list>($8),
+				              std::unique_ptr<std::vector<IntrusivePtr<Attr>>>($11));
 			}
 
 	|	TOK_TYPE global_id ':'
@@ -1147,7 +1147,8 @@ decl:
 			{
 			cur_decl_type_id = 0;
 			IntrusivePtr id{AdoptRef{}, $2};
-			add_type(id.get(), {AdoptRef{}, $5}, $6);
+			add_type(id.get(), {AdoptRef{}, $5},
+			         std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6});
 			zeekygen_mgr->Identifier(std::move(id));
 			}
 
@@ -1180,7 +1181,8 @@ func_hdr:
 			{
 			IntrusivePtr id{AdoptRef{}, $2};
 			begin_func(id.get(), current_module.c_str(),
-				FUNC_FLAVOR_FUNCTION, 0, {NewRef{}, $3}, $4);
+				FUNC_FLAVOR_FUNCTION, 0, {NewRef{}, $3},
+				std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$4});
 			$$ = $3;
 			zeekygen_mgr->Identifier(std::move(id));
 			}
@@ -1194,7 +1196,8 @@ func_hdr:
 				}
 
 			begin_func($2, current_module.c_str(),
-				   FUNC_FLAVOR_EVENT, 0, {NewRef{}, $3}, $4);
+				   FUNC_FLAVOR_EVENT, 0, {NewRef{}, $3},
+				   std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$4});
 			$$ = $3;
 			}
 	|	TOK_HOOK def_global_id func_params opt_attr
@@ -1202,13 +1205,15 @@ func_hdr:
 			$3->ClearYieldType(FUNC_FLAVOR_HOOK);
 			$3->SetYieldType(base_type(TYPE_BOOL));
 			begin_func($2, current_module.c_str(),
-				   FUNC_FLAVOR_HOOK, 0, {NewRef{}, $3}, $4);
+				   FUNC_FLAVOR_HOOK, 0, {NewRef{}, $3},
+				   std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$4});
 			$$ = $3;
 			}
 	|	TOK_REDEF TOK_EVENT event_id func_params opt_attr
 			{
 			begin_func($3, current_module.c_str(),
-				   FUNC_FLAVOR_EVENT, 1, {NewRef{}, $4}, $5);
+				   FUNC_FLAVOR_EVENT, 1, {NewRef{}, $4},
+				   std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$5});
 			$$ = $4;
 			}
 	;
@@ -1334,16 +1339,16 @@ index_slice:
 opt_attr:
 		attr_list
 	|
-			{ $$ = 0; }
+			{ $$ = nullptr; }
 	;
 
 attr_list:
 		attr_list attr
-			{ $1->push_back($2); }
+			{ $1->emplace_back(AdoptRef{}, $2); }
 	|	attr
 			{
-			$$ = new attr_list;
-			$$->push_back($1);
+			$$ = new std::vector<IntrusivePtr<Attr>>;
+			$$->emplace_back(AdoptRef{}, $1);
 			}
 	;
 
@@ -1509,7 +1514,9 @@ stmt:
 			{
 			set_location(@1, @7);
 			$$ = add_local({AdoptRef{}, $2}, {AdoptRef{}, $3}, $4,
-			               {AdoptRef{}, $5}, $6, VAR_REGULAR).release();
+			               {AdoptRef{}, $5},
+			               std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			               VAR_REGULAR).release();
 			if ( ! $8 )
 			    brofiler.AddStmt($$);
 			}
@@ -1518,7 +1525,9 @@ stmt:
 			{
 			set_location(@1, @6);
 			$$ = add_local({AdoptRef{}, $2}, {AdoptRef{}, $3}, $4,
-			               {AdoptRef{}, $5}, $6, VAR_CONST).release();
+			               {AdoptRef{}, $5},
+			               std::unique_ptr<std::vector<IntrusivePtr<Attr>>>{$6},
+			               VAR_CONST).release();
 			if ( ! $8 )
 			    brofiler.AddStmt($$);
 			}
@@ -1664,7 +1673,8 @@ case_type:
 			else
 				case_var = install_ID(name, current_module.c_str(), false, false);
 
-			add_local(case_var, std::move(type), INIT_NONE, 0, 0, VAR_REGULAR);
+			add_local(case_var, std::move(type), INIT_NONE, nullptr, nullptr,
+			          VAR_REGULAR);
 			$$ = case_var.release();
 			}