Locale fallback raises "can't modify frozen NilClass" when used with :count

[zinkkrysty]

Using 0.7.0 with Rails 4.1.10. Configured like this in application.rb:

config.i18n.fallbacks = true

and the following translation strings:

en:
  car:
    one: 1 car
    other: %{count} cars
es:
  car:
    one: 
    other: 

If I run

I18n.locale = :es
I18n.t 'car', count: 2

I get this exception

RuntimeError: can't modify frozen NilClass
from ... /i18n-0.7.0/lib/i18n/backend/metadata.rb:24:in `translation_metadata'

And if I check the value of the car translation key:

I18n.t 'car'
=> {:one=>nil, :other=>nil}

Full stack trace:

[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/metadata.rb:24 :in `translation_metadata`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/metadata.rb:47 :in `interpolate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/base.rb:41 :in `translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/metadata.rb:43 :in `block in translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/metadata.rb:58 :in `with_metadata`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/metadata.rb:43 :in `translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/fallbacks.rb:45 :in `block (2 levels) in translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/fallbacks.rb:44 :in `catch`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/fallbacks.rb:44 :in `block in translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/fallbacks.rb:42 :in `each`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n/backend/fallbacks.rb:42 :in `translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n.rb:158 :in `block in translate`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n.rb:154 :in `catch`
[GEM_ROOT]/gems/i18n-0.7.0/lib/i18n.rb:154 :in `translate`
[GEM_ROOT]/gems/actionview-4.1.10/lib/action_view/helpers/translation_helper.rb:68 :in `translate`

[carlosantoniodasilva]

Are you using Ruby 2.2 I imagine?

We have a failure on 2.2 with a similar error, if you are I imagine it's the same issue, I'll try to take a look on it. Thanks for the information.

[zinkkrysty]

Yes, I am using ruby-2.2.1. Thanks for looking into this.

[zinkkrysty]

I see what you mean, these errors are quite similar: https://travis-ci.org/svenfuchs/i18n/jobs/44596629

So I'd imagine, ruby 2.2 is not currently supported?

[graaff]

#305 provides a patch for this.

[zinkkrysty]

As there is more than half a year since ruby 2.2 release it would be great if this got fixed. Anybody looking into @graaff 's PR or has a better solution?

[zinkkrysty]

This is still creating issues. Any news on getting this fixed? Ruby 2.3.1 is the latest stable version right now. Would really appreciate if we can get a fix for this. It's a great annoyance in Ruby on Rails projects with multiple locales. Thanks!

[radar]

#305 has been merged into master, and it solves this issue. Thanks everyone for reporting it!