Revert Uglifier to 4.1.18, due to bug in Uglify 3.4.9.

mishoo/UglifyJS#3245 documents a bug which occurs when using compression. There does not appear to be any way to disable this particular path through the uglifier.
wyeworks · Nov 1, 2018 · c7bfbe3 · c7bfbe3
1 parent 10e4565
commit c7bfbe3
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diff --git a/Gemfile.lock b/Gemfile.lock
@@ -617,7 +617,7 @@ GEM
     ttfunk (1.5.1)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.19)
+    uglifier (4.1.18)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.4.0)
     unicorn (5.4.1)

diff --git a/config/initializers/uglifier_restriction.rb b/config/initializers/uglifier_restriction.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+unless Uglifier::VERSION == "4.1.18"
+  raise "Uglifier 4.1.19 has a bug (https://github.com/mishoo/UglifyJS2/issues/3245).
+  Please ensure it's fixed before advancing"
+end