Something is wrong with quotes in unicode values

[incubus]

Hi! Happy New Year!

I just want to migrate from serialization to hstore and get the strange error:

irb(main):012:0> t = Translation.find(50)

The old serialization:

irb(main):013:0> t.languages
=> {:ru=>"Скидка купоны/подарочные билеты путешествия", :en=>"Travel discount coupons/gift tickets", :zh=>"旅游折扣券/赠票", :fr=>"Voyage rabais coupons cadeaux billets", :de=>"Rabatt-Gutscheine/Gift Fahrkarten"}

The new hstore:

irb(main):014:0> t.lang = { 'zh' => t.languages[:zh] }
=> {"zh"=>"旅游折扣券/赠票"}
irb(main):015:0> t.save

(0.3ms) UPDATE "translations" SET "lang" = 'zh=>旅游折扣券/赠票', "updated_at" = '2013-01-02 00:46:35.002511' WHERE "translations"."id" = 50
ERROR: Syntax error near '?' at position 7
LINE 1: UPDATE "translations" SET "lang" = 'zh=>旅游折扣券/赠票', "u...

ArgumentError: invalid byte sequence in UTF-8
from /Users/incubus/.rvm/gems/ruby-1.9.3-p362/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1141:in ===' from /Users/incubus/.rvm/gems/ruby-1.9.3-p362/gems/activerecord-3.2.9/lib/active_record/connection_adapters/postgresql_adapter.rb:1141:intranslate_exception'

I don't see quotes in SET "lang" = 'zh=>旅游折扣券/赠票' and it also breaks postgresql adapter error output.

It works fine with ASCII:

irb(main):016:0> t.lang = { 'en' => t.languages[:en] }
=> {"en"=>"Travel discount coupons/gift tickets"}
irb(main):017:0> t.save
(0.2ms) UPDATE "translations" SET "lang" = 'en=>"Travel discount coupons/gift tickets"', "updated_at" = '2013-01-02 00:48:39.191811' WHERE "translations"."id" = 50
=> true

[incubus]

Nevermind, this issue is described there #18 .