= render :partial => 'interface', :locals => {:f => f, :interface => @device.interfaces }

- f.fields_for(interfaces_attributes[]), @interfaces do |fi|

Showing app/views/devices/_interface.html.haml where line #2 raised:

compile error
/home/bass/svn/catalogo/trunk/catalogo/app/views/devices/_interface.html.haml:2: syntax error, unexpected ',', expecting kEND
..._for(interfaces_attributes[]), @interfaces do |fi|;
                              ^