From 9e65d8bea72068f042b41ffa0df55791b4c7d71f Mon Sep 17 00:00:00 2001
From: Ben Newman <ben@meteor.com>
Date: Tue, 31 Oct 2017 14:32:53 -0400
Subject: [PATCH] Enable dead code elimination in minifier-js to fix #9260.

The react-dom@16 npm package recently got stricter about how it checks
that dead code elimination is enabled. Specifically, it no longer just
checks that process.env.NODE_ENV is replaced with "production" but also
requires conditional branches to be completely removed if the replacement
makes them unreachable:
https://github.com/facebook/react/blob/master/packages/react-dom/npm/index.js

The minifier-js package recently had its minor version bumped for Meteor
1.6, so I think it's safe to enable dead code elimination in a patch
version update. If we bumped the minor version again (to 2.3.0), this
version of minifier-js would not be usable with Meteor 1.6, and would
probably have to wait for Meteor 1.6.1.

Bumping the patch version of standard-minifier-js is also necessary
because it uses minifier-js as a compiler plugin, and would otherwise
continue to bundle the old minifier-js plugin.
---
 packages/minifier-js/minifier.js         | 2 +-
 packages/minifier-js/package.js          | 2 +-
 packages/standard-minifier-js/package.js | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/minifier-js/minifier.js b/packages/minifier-js/minifier.js
index ba60671422..4defbfb704 100644
--- a/packages/minifier-js/minifier.js
+++ b/packages/minifier-js/minifier.js
@@ -11,7 +11,7 @@ meteorJsMinify = function (source) {
       compress: {
         drop_debugger: false,
         unused: false,
-        dead_code: false,
+        dead_code: true,
         global_defs: {
           "process.env.NODE_ENV": NODE_ENV
         }
diff --git a/packages/minifier-js/package.js b/packages/minifier-js/package.js
index 8bfb2c5f3e..51d89ccb8f 100644
--- a/packages/minifier-js/package.js
+++ b/packages/minifier-js/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "JavaScript minifier",
-  version: "2.2.0"
+  version: "2.2.1"
 });
 
 Npm.depends({
diff --git a/packages/standard-minifier-js/package.js b/packages/standard-minifier-js/package.js
index 4ef422de3f..100ca25df0 100644
--- a/packages/standard-minifier-js/package.js
+++ b/packages/standard-minifier-js/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'standard-minifier-js',
-  version: '2.2.0',
+  version: '2.2.1',
   summary: 'Standard javascript minifiers used with Meteor apps by default.',
   documentation: 'README.md',
 });