4 files changed, 29 insertions, 1 deletions
diff --git a/crawl-ref/source/overmap.cc b/crawl-ref/source/overmap.cc
index 239c78504d..af6283d96d 100644
--- a/crawl-ref/source/overmap.cc
+++ b/crawl-ref/source/overmap.cc
@@ -606,6 +606,7 @@ static bool _unnotice_stair(const level_pos &pos)
 
 bool unnotice_feature(const level_pos &pos)
 {
+    shopping_list.forget_pos(pos);
     return (_unnotice_portal(pos)
             || _unnotice_portal_vault(pos)
             || _unnotice_altar(pos)
diff --git a/crawl-ref/source/shopping.cc b/crawl-ref/source/shopping.cc
index 58d3aac0b6..9ae19ef18b 100644
--- a/crawl-ref/source/shopping.cc
+++ b/crawl-ref/source/shopping.cc
@@ -2391,7 +2391,32 @@ int ShoppingList::size() const
 
 void ShoppingList::move_things(const coord_def &src, const coord_def &dst)
 {
-    ASSERT(false); // Not implemented yet
+    for (unsigned int i = 0; i < list->size(); i++)
+    {
+        CrawlHashTable &thing = (*list)[i];
+        level_pos       lpos  = ShoppingList::thing_pos(thing);
+
+        if (lpos.id != level_id::current())
+            continue;
+
+        if (lpos.pos == src)
+        {
+            lpos.pos = dst;
+            thing[SHOPPING_THING_POS_KEY] = lpos;
+        }
+    }
+}
+
+void ShoppingList::forget_pos(const level_pos &pos)
+{
+    for (unsigned int i = (list->size() - 1); i>= 0; i--)
+    {
+        const CrawlHashTable &thing = (*list)[i];
+        const level_pos       lpos  = ShoppingList::thing_pos(thing);
+
+        if (lpos == pos)
+            list->erase(i);
+    }
 }
 
 void ShoppingList::gold_changed(int old_amount, int new_amount)
diff --git a/crawl-ref/source/shopping.h b/crawl-ref/source/shopping.h
index cc38e1f8be..0679c194da 100644
--- a/crawl-ref/source/shopping.h
+++ b/crawl-ref/source/shopping.h
@@ -50,6 +50,7 @@ public:
     void gold_changed(int old_amount, int new_amount);
 
     void move_things(const coord_def &src, const coord_def &dst);
+    void forget_pos(const level_pos &pos);
 
     void display();
 
diff --git a/crawl-ref/source/terrain.cc b/crawl-ref/source/terrain.cc
index c583815690..5278fd6b12 100644
--- a/crawl-ref/source/terrain.cc
+++ b/crawl-ref/source/terrain.cc
@@ -632,6 +632,7 @@ static bool _dgn_shift_feature(const coord_def &pos)
 
         env.markers.move(pos, dest);
         dungeon_events.move_listeners(pos, dest);
+        shopping_list.move_things(pos, dest);
     }
     return (true);
 }