cache - `cache_erb_fragment': bad value for range

[joeruby]

Is there a way to get caching working in Markaby? I saw ticket #5, which has been sitting waiting for 0.5 for three months. I get this error:

cache do
# or
cache 'foo' do
# or 
cache('foo') do

.../action_controller/caching.rb:283:in `cache_erb_fragment': bad value for range

[joeruby]

With Markaby 0.5 I get this error:

/opt/local/lib/ruby/gems/1.8/gems/markaby-0.5/lib/markaby/builder.rb:192:in `method_missing': no such method `length'

from this:

cache("foo/bar") do
  ...
end