Surviving rackup crashes when no output is available

rackup

#!/usr/local/rvm/rubies/ruby-1.9.2-p180/bin/ruby
#
# This file was generated by Julik.
begin
  require 'rubygems'

  version = ">= 0"

  if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
    version = $1
    ARGV.shift
  end

  gem 'rack', version
  load Gem.bin_path('rack', 'rackup', version)
rescue Exception => e
  File.open("/tmp/rackup-crash.log", "w") do | f |
    f.puts(ENV.inspect)
    f.puts(e.class.to_s)
    f.puts(e.message)
    f.puts(e.backtrace.join("\n"))
  end
  # and raise further
  raise e
end