From c1e3a7396f2863823ab870ef2fbaf569d4c7c7e4 Mon Sep 17 00:00:00 2001
From: Xiaoming Gao <gaoxm@gaoxm-mbp.local>
Date: Wed, 19 Dec 2018 12:05:02 -0500
Subject: [PATCH] filter validations early in history

Follow @wonga00's comment in https://github.com/openstreetmap/iD/pull/5627
---
 modules/core/history.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/core/history.js b/modules/core/history.js
index 7db328d11..239034733 100644
--- a/modules/core/history.js
+++ b/modules/core/history.js
@@ -40,6 +40,7 @@ export function coreHistory(context) {
     var _stack;
     var _index;
     var _tree;
+    var validations = _filter(Validations, _isFunction);
 
 
     // internal _act, accepts list of actions and eased time
@@ -282,7 +283,7 @@ export function coreHistory(context) {
 
         validate: function(changes) {
             return _flatten(_map(
-                _filter(Validations, _isFunction),
+                validations,
                 function(fn) {
                     return fn(context)(changes, _stack[_index].graph);
                 }