From ff8338dcb219aa6c3b1beae3ed5ea818c97b967f Mon Sep 17 00:00:00 2001
From: Robert Jackson <rjackson@linkedin.com>
Date: Thu, 28 Feb 2019 19:12:28 -0500
Subject: [PATCH] [BUGFIX lts] Enable maximum rerendering limit to be
 customized.

As of Ember 3.4 the autorun assertion is removed, and usage of native
promises has increase the likely hood that this rerender limit of 10
will be hit in "normal" scenarios.

Co-authored-by: Kris Selden <kris.selden@gmail.com>
---
 packages/@ember/-internals/environment/lib/env.ts  | 13 +++++++++++++
 packages/@ember/-internals/glimmer/lib/renderer.ts |  3 ++-
 tests/docs/expected.js                             |  1 +
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/packages/@ember/-internals/environment/lib/env.ts b/packages/@ember/-internals/environment/lib/env.ts
index e6d907a62ff..7e42a6f04ef 100644
--- a/packages/@ember/-internals/environment/lib/env.ts
+++ b/packages/@ember/-internals/environment/lib/env.ts
@@ -111,6 +111,19 @@ export const ENV = {
   */
   _JQUERY_INTEGRATION: true,
 
+  /**
+    Controls the maximum number of scheduled rerenders without "settling". In general,
+    applications should not need to modify this environment variable, but please
+    open an issue so that we can determine if a better default value is needed.
+
+    @property _RERENDER_LOOP_LIMIT
+    @for EmberENV
+    @type number
+    @default 1000
+    @private
+   */
+  _RERENDER_LOOP_LIMIT: 1000,
+
   EMBER_LOAD_HOOKS: {} as {
     [hook: string]: Function[];
   },
diff --git a/packages/@ember/-internals/glimmer/lib/renderer.ts b/packages/@ember/-internals/glimmer/lib/renderer.ts
index e7719ec3efa..1d3417601be 100644
--- a/packages/@ember/-internals/glimmer/lib/renderer.ts
+++ b/packages/@ember/-internals/glimmer/lib/renderer.ts
@@ -1,3 +1,4 @@
+import { ENV } from '@ember/-internals/environment';
 import { runInTransaction } from '@ember/-internals/metal';
 import {
   fallbackViewRegistry,
@@ -227,7 +228,7 @@ let loops = 0;
 function loopEnd() {
   for (let i = 0; i < renderers.length; i++) {
     if (!renderers[i]._isValid()) {
-      if (loops > 10) {
+      if (loops > ENV._RERENDER_LOOP_LIMIT) {
         loops = 0;
         // TODO: do something better
         renderers[i].destroy();
diff --git a/tests/docs/expected.js b/tests/docs/expected.js
index 3a9e419fca3..1842c944a95 100644
--- a/tests/docs/expected.js
+++ b/tests/docs/expected.js
@@ -10,6 +10,7 @@ module.exports = {
     '[]',
     '_APPLICATION_TEMPLATE_WRAPPER',
     '_JQUERY_INTEGRATION',
+    '_RERENDER_LOOP_LIMIT',
     '_TEMPLATE_ONLY_GLIMMER_COMPONENTS',
     '__container__',
     '_activeQPChanged',