form_tag doesn't compile as expected while using render :layout with erb partial

[zernel]

Hi there, I have got a problem when I try to render a erb partial as layout, actually there are 2 key elements to reproduce:

1. render erb partial as layout in haml template
2. form_tag in erb partial

Please check the sample code below:

# template.haml
= render layout: 'form' do
  %h4
    Test

# form.html.erb
<%= yield %>
<%= form_tag '/test' do -%>
  <%= text_field_tag :test %>
  <%= submit_tag %>
<%end -%>

this gets compiled to:

<h4>Test</h4>

<input type="text" name="test" id="test">
<input type="submit" name="commit" value="Save changes">
<form action="/test" accept-charset="UTF-8" method="post">
   <input name="utf8" type="hidden" value="✓"><input type="hidden" name="authenticity_token" value="...">
</form>

The form content were render in wrong place (outside of form tag), it will work correctly if I rewrite the form.html.erb to haml, I guess that maybe a bug.

[serv]

I am noticing a few things that are raising red flags.

• <%= yield %> is outside the form_tag. Maybe input tags are being inserted with yield.
• Change <%end -%> to just <% end %>

[zernel]

@serv good point, I try to move the yield into form_tag and even remove the yield from partial, neither is working (the input tags are still outside). And I try to change the <% end %> but still no lucky.
It will work if I write form tag manually instead using form_tag helper method. Something is wrong while rendering the form_tag in this case.

Anyway, thanks for your time :)

[zernel]

After digging more in the source code, I found the block became empty while it's execute in form_tag, but still not find the reason. quite weird.

[syguer]

@zernel please let me know version of rails and haml. Is it still happen on latest both version?