Finding precompile errors in rails, to be executed in 'rails console'

precompilerrors.rb

JS_PATH = "app/assets/javascripts/**/*.js"; 
Dir[JS_PATH].each do |file_name|
	puts "\n#{file_name}"
	begin
	Uglifier.compile(File.read(file_name))
	rescue => e
	  puts $!
	  puts $@
	end
end