Merge branch 'backport_from_ee' into 'master'

Minor backport from EE

See merge request gitlab-org/gitlab-ce!15647

app/controllers/concerns/issuable_actions.rb

@@ -54,7 +54,7 @@ module IssuableActions
   end
 
   def destroy
-    Issuable::DestroyService.new(project, current_user).execute(issuable)
+    Issuable::DestroyService.new(issuable.project, current_user).execute(issuable)
     TodoService.new.destroy_issuable(issuable, current_user)
 
     name = issuable.human_class_name