Fail to deface haml template with UTF-8 chars inside

[Em-AK]

When I deface my template with no UTF-8 characters in it, everything is working well. (for the purpose of this bug report the deface is just removing the h2 element)

$ rake deface:get_result\['multipass/admin/admin/index'\] --trace
** Invoke deface:get_result (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute deface:get_result
---------------- Before ----------------
<h2>Synthese</h2>
<%= render 'admin/shared/nav' %>

---------------- Overrides (1)--------
- 'multipass/home/engine_add_schools_to_admin_nav' will be applied.

---------------- After ----------------

<%= render 'admin/shared/nav' %>

---------------- Diff -----------------
-<h2>Synthese</h2>
+
 <%= render 'admin/shared/nav' %>

I change my template from

%h2 Synthese
= render 'admin/shared/nav'

to

%h2 Synthèse
= render 'admin/shared/nav'

When I deface the second template (which contains some UTF-8) the operation fails with
Encoding::UndefinedConversionError: "\xC3" from ASCII-8BIT to UTF-8

$ rake deface:get_result\['multipass/admin/admin/index'\] --trace
** Invoke deface:get_result (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute deface:get_result
---------------- Before ----------------
rake aborted!
Encoding::UndefinedConversionError: "\xC3" from ASCII-8BIT to UTF-8
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/haml-4.0.6/lib/haml/compiler.rb:42:in `encode'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/haml-4.0.6/lib/haml/compiler.rb:42:in `precompiled'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/haml-4.0.6/lib/haml/compiler.rb:47:in `precompiled_with_return_value'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/haml-4.0.6/lib/haml/engine.rb:129:in `render'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/deface-1.0.1/lib/deface/haml_converter.rb:102:in `result'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/deface-1.0.1/lib/deface/template_helper.rb:24:in `load_template_source'
/home/emak/.rvm/gems/ruby-2.2.2@famille/gems/deface-1.0.1/tasks/utils.rake:37:in `block (2 levels) in <top (required)>'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:240:in `call'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:240:in `block in execute'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:235:in `each'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:235:in `execute'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:179:in `block in invoke_with_call_chain'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:172:in `invoke_with_call_chain'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/task.rb:165:in `invoke'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:150:in `invoke_task'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `block (2 levels) in top_level'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `each'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:106:in `block in top_level'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:115:in `run_with_threads'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:100:in `top_level'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:78:in `block in run'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
/home/emak/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:75:in `run'
/home/emak/.rvm/rubies/ruby-2.2.2/bin/rake:33:in `<main>'
Tasks: TOP => deface:get_result

[bartlomiejmatlega]

I've got this same error :( It looks like deface still does not fully support haml.