Attempt to Reproduce the bug

attempt_to_reproduce_the_bug.rb

####### ONLY DataMapper #######

>> episodes = Episode.all
[#<Episode @id=1 @title="Cache Variable">, #<Episode @id=2 @title="Cache Variable"> , #<Episode @id=3 @title="Cache Variable">]

>> episode = episodes.shift
>> episodes.each do |e|
>>   puts e.id
>> end

1
2
3

datamapper_plus_haml.haml

### HAML AND DATAMAPPER ######


### Assuming that @episodes is:
#
# [#<Episode @id=1 @title="Cache Variable">, #<Episode @id=2 @title="Cache Variable"> , #<Episode @id=3 @title="Cache Variable">]
#  

#current_episode
	- unless @episodes.empty?
		- @episode = @episodes.shift
		%h3
			= "Episódio #{@episode.id} - #{@episode.title}"
		%span
			= @episode.description

#other_episodes
	- @episodes.each do |episode|
                %h3
		        = "Episódio #{episode.id} - #{episode.title}"
		%span
			= episode.description

#### The OUTPUT ####

<div id="current_episode">
   <h3>Episódio 1 - Cache Variable</h3>
</div>

<div id="other-episodes">
  <h3>Episódio 2 - Cache Variable</h3>
  <span>...</span>


  <!-- WTF???????? -->
  <h3>Episódio 2 - Cache Variable</h3>
  <span>...</span>
  <!-- WTF???????? -->


  <h3>Episódio 3 - Cache Variable</h3>
  <span>...</span>

</div>

The Solution.haml

### HAML AND DATAMAPPER ######


### Assuming that @episodes is:
#
# [#<Episode @id=1 @title="Cache Variable">, #<Episode @id=2 @title="Cache Variable"> , #<Episode @id=3 @title="Cache Variable">]
#  

#current_episode
	- unless @episodes.empty?
		- @episode = @episodes.shift
		%h3
			= "Episódio #{@episode.id} - #{@episode.title}"
		%span
			= @episode.description

- # INSTEAD ITERATE over a DataMapper collection, just converto to a Ruby Array and it works very well
- #
- # So Appears this is a bug in the Haml
-
#other_episodes
	- @episodes.to_a.each do |episode|
                %h3
		        = "Episódio #{episode.id} - #{episode.title}"
		%span
			= episode.description

#### The OUTPUT ####

<div id="current_episode">
   <h3>Episódio 1 - Cache Variable</h3>
</div>

<div id="other-episodes">
  <h3>Episódio 2 - Cache Variable</h3>
  <span>...</span>

  <h3>Episódio 3 - Cache Variable</h3>
  <span>...</span>

</div>