I have a Rake task which I have simplified below. I'm using Ruby 1.9 on Windows.

Perhaps you would like to guess the outcome of calling the Rake task "list_all_levels" below? It should be:

"Hello level 1"
"Hello level 2"
"Hello level 3"

But for reasons unknown to me, it prints only "Hello level 1" and then stops.

That is, it always invokes only the first task. If I change the first line to pass the arg "42", it would print "Hello level 42" and then stop.

I'm wondering why does it not invoke the task 3 times and print all 3 lines? And is there any way to get it to work how I would expect?

task :list_all_levels => [] do
    Rake::Task[:list].invoke 1
    Rake::Task[:list].invoke 2
    Rake::Task[:list].invoke 3
end

task :list, [:level] => [] do |t, args|
    puts "Hello level #{args.level}"
end