From 0cc4fef9f985f31da5373f22b1ccac7fe0f430b2 Mon Sep 17 00:00:00 2001
From: David Ascher <david.ascher@gmail.com>
Date: Fri, 26 May 2017 19:24:30 -0700
Subject: [PATCH 1/3] Disable a micro-option in uglify that appears to be buggy

See https://github.com/facebookincubator/create-react-app/issues/2376
---
 packages/react-scripts/config/webpack.config.prod.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index 446fd5ca39d..1b33fc407a4 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -259,6 +259,9 @@ module.exports = {
     // Generates an `index.html` file with the <script> injected.
     new HtmlWebpackPlugin({
       inject: true,
+      compress: {
+        comparisons: false
+      },
       template: paths.appHtml,
       minify: {
         removeComments: true,

From d49ba5467e6409f461b0b27b083a8be904a89127 Mon Sep 17 00:00:00 2001
From: David Ascher <david.ascher@gmail.com>
Date: Fri, 26 May 2017 20:02:14 -0700
Subject: [PATCH 2/3] wrong plugin

---
 packages/react-scripts/config/webpack.config.prod.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index 1b33fc407a4..eb88b99570e 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -259,9 +259,6 @@ module.exports = {
     // Generates an `index.html` file with the <script> injected.
     new HtmlWebpackPlugin({
       inject: true,
-      compress: {
-        comparisons: false
-      },
       template: paths.appHtml,
       minify: {
         removeComments: true,
@@ -285,6 +282,7 @@ module.exports = {
     new webpack.optimize.UglifyJsPlugin({
       compress: {
         warnings: false,
+        comparisons: false,
         // This feature has been reported as buggy a few times, such as:
         // https://github.com/mishoo/UglifyJS2/issues/1964
         // We'll wait with enabling it by default until it is more solid.

From 73f311e58860e6da41a2b555506d260222362c84 Mon Sep 17 00:00:00 2001
From: Dan Abramov <dan.abramov@gmail.com>
Date: Sat, 27 May 2017 12:36:01 +0100
Subject: [PATCH 3/3] Add a comment

---
 packages/react-scripts/config/webpack.config.prod.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index eb88b99570e..27bbdcca72f 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -282,6 +282,10 @@ module.exports = {
     new webpack.optimize.UglifyJsPlugin({
       compress: {
         warnings: false,
+        // Disabled because of an issue with Uglify breaking seemingly valid code:
+        // https://github.com/facebookincubator/create-react-app/issues/2376
+        // Pending further investigation:
+        // https://github.com/mishoo/UglifyJS2/issues/2011
         comparisons: false,
         // This feature has been reported as buggy a few times, such as:
         // https://github.com/mishoo/UglifyJS2/issues/1964