Problems with Timeout.timeout's use of Thread#raise

1. code.rb

require 'timeout'

def process_foos(error_to_rescue)
  begin
    # -> process Foos
    # -> if we run out of Foos, raise
    sleep 2
  rescue error_to_rescue
    # -> email the manager that we ran out of Foos
    puts <<-MESSAGE
      There was a problem. The problem is we ran out of Foos.
      That is definitely what the problem was.
      Don't worry, we emailed the Foo manager and elegantly carried on
      into the outer context.
    MESSAGE
  end
end

begin
  puts "Calling some poorly-written code."
  Timeout.timeout(1){ process_foos(Exception) }
rescue Timeout::Error
  puts "Processing the Foos took too long."
end

begin
  puts "\nCalling some well-written code."
  # even better would be FooError
  Timeout.timeout(1){ process_foos(StandardError) }
rescue Timeout::Error
  puts "Processing the Foos took too long."
end

2. output.txt

➔ ruby code.rb
Calling some poorly-written code.
      There was a problem. The problem is we ran out of Foos.
      That is definitely what the problem was.
      Don't worry, we emailed the Foo manager and elegantly carried on
      into the outer context.

Calling some well-written code.
Processing the Foos took too long.