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Rails 5.1.1，ruby 2.4.1，webpacker 2.0，通過rake test:system運行系統測試時。如何調試webpacker運行兩次？
如果有辦法看到更多的調試日誌，這將有利於像哪個文件加載哪些模塊等
請注意，這是隻發生在沒有緩存，測試應是可。如果有緩存，webpacker根本不運行，這是正常的。
/usr/local/lib/ruby/gems/2.4.0/gems/webpacker-2.0/lib/tasks/installers.rake:1: warning: already initialized constant INSTALLERS
/usr/local/lib/ruby/gems/2.4.0/gems/webpacker-2.0/lib/tasks/installers.rake:1: warning: previous definition of INSTALLERS was here
/usr/local/lib/ruby/gems/2.4.0/gems/webpacker-2.0/lib/tasks/webpacker/install.rake:1: warning: already initialized constant WEBPACKER_APP_TEMPLATE_PATH
/usr/local/lib/ruby/gems/2.4.0/gems/webpacker-2.0/lib/tasks/webpacker/install.rake:1: warning: previous definition of WEBPACKER_APP_TEMPLATE_PATH was here
Webpacker is installed � �
Using ..../config/webpacker.yml file for setting up webpack paths
Webpacker is installed � �
Using ..../config/webpacker.yml file for setting up webpack paths
[Webpacker] Compiling assets �
[Webpacker] Compiling assets �