# HG changeset patch
# User frosch <frosch@openttd.org>
# Date 2015-04-27 19:28:22
# Node ID 2a4a4665dd636fc94bedc15462f73c47ba24d546
# Parent  ee33e060da854a8761682c391216bdb236959c4b

(svn r27258) -Fix [FS#6287]: ScriptList::RemoveList failed to remove a list from itself.

diff --git a/src/script/api/script_list.cpp b/src/script/api/script_list.cpp
--- a/src/script/api/script_list.cpp
+++ b/src/script/api/script_list.cpp
@@ -556,6 +556,8 @@ void ScriptList::Sort(SorterType sorter,
 
 void ScriptList::AddList(ScriptList *list)
 {
+	if (list == this) return;
+
 	ScriptListMap *list_items = &list->items;
 	for (ScriptListMap::iterator iter = list_items->begin(); iter != list_items->end(); iter++) {
 		this->AddItem((*iter).first);
@@ -565,6 +567,8 @@ void ScriptList::AddList(ScriptList *lis
 
 void ScriptList::SwapList(ScriptList *list)
 {
+	if (list == this) return;
+
 	this->items.swap(list->items);
 	this->buckets.swap(list->buckets);
 	Swap(this->sorter, list->sorter);
@@ -694,9 +698,13 @@ void ScriptList::RemoveList(ScriptList *
 {
 	this->modifications++;
 
-	ScriptListMap *list_items = &list->items;
-	for (ScriptListMap::iterator iter = list_items->begin(); iter != list_items->end(); iter++) {
-		this->RemoveItem((*iter).first);
+	if (list == this) {
+		Clear();
+	} else {
+		ScriptListMap *list_items = &list->items;
+		for (ScriptListMap::iterator iter = list_items->begin(); iter != list_items->end(); iter++) {
+			this->RemoveItem((*iter).first);
+		}
 	}
 }
 
@@ -756,14 +764,12 @@ void ScriptList::KeepBottom(int32 count)
 
 void ScriptList::KeepList(ScriptList *list)
 {
+	if (list == this) return;
+
 	this->modifications++;
 
 	ScriptList tmp;
-	for (ScriptListMap::iterator iter = this->items.begin(); iter != this->items.end(); iter++) {
-		tmp.AddItem((*iter).first);
-		tmp.SetValue((*iter).first, (*iter).second);
-	}
-
+	tmp.AddList(this);
 	tmp.RemoveList(list);
 	this->RemoveList(&tmp);
 }