Let's try telling uglifier to user 1k lines

config/environments/development.rb

@@ -18,6 +18,7 @@ Discourse::Application.configure do
 
   # Do not compress assets
   config.assets.compress = false
+  config.assets.js_compressor = Uglifier.new(max_line_len: 1024)
 
   # Don't Digest assets, makes debugging uglier
   config.assets.digest = false

config/environments/production.rb

@@ -12,7 +12,7 @@ Discourse::Application.configure do
   # Disable Rails's static asset server (Apache or nginx will already do this)
   config.serve_static_assets = GlobalSetting.serve_static_assets
 
-  config.assets.js_compressor  = :uglifier
+  config.assets.js_compressor = Uglifier.new(max_line_len: 1024)
   config.assets.css_compressor = :sass
 
   # stuff should be pre-compiled