workaround for #14732

emberjs · Dec 18, 2016 · 8c5b6e1 · 8c5b6e1
1 parent 93dc72b
commit 8c5b6e1
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/packages/ember-metal/lib/meta.js b/packages/ember-metal/lib/meta.js
@@ -9,6 +9,7 @@ import { runInDebug, assert } from './debug';
 import {
   removeChainWatcher
 } from './chains';
+import { has } from 'require';
 
 let counters = {
   peekCalls: 0,
@@ -67,8 +68,10 @@ const IS_PROXY = 1 << 4;
 if (isEnabled('ember-glimmer-detect-backtracking-rerender') ||
     isEnabled('ember-glimmer-allow-backtracking-rerender')) {
   members.lastRendered = ownMap;
-  members.lastRenderedReferenceMap = ownMap; // FIXME: not used in production, remove me from prod builds
-  members.lastRenderedTemplateMap = ownMap; // FIXME: not used in production, remove me from prod builds
+  if (has('ember-debug')) { //https://github.com/emberjs/ember.js/issues/14732
+    members.lastRenderedReferenceMap = ownMap;
+    members.lastRenderedTemplateMap = ownMap;
+  }
 }
 
 let memberNames = Object.keys(members);
@@ -109,8 +112,10 @@ export function Meta(obj, parentMeta) {
   if (isEnabled('ember-glimmer-detect-backtracking-rerender') ||
       isEnabled('ember-glimmer-allow-backtracking-rerender')) {
     this._lastRendered = undefined;
-    this._lastRenderedReferenceMap = undefined; // FIXME: not used in production, remove me from prod builds
-    this._lastRenderedTemplateMap = undefined; // FIXME: not used in production, remove me from prod builds
+    runInDebug(() => {
+      this._lastRenderedReferenceMap = undefined;
+      this._lastRenderedTemplateMap = undefined;
+    });
   }
 
   this._initializeListeners();