rake db:migrate throw "invalid byte sequence in US-ASCII"

[tetraf]

With Debian 7.

$ rake db:migrate RAILS_ENV="development"
==  CreateUsers: migrating ====================================================
-- create_table("users", {:force=>true})
   -> 0.0015s
-- add_index(:users, :login, {:unique=>true})
   -> 0.0004s
==  CreateUsers: migrated (0.0020s) ===========================================

rake aborted!
/var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/trace_output.rb:16:in `block in trace_on': invalid byte sequence in US-ASCII (ArgumentError)
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/trace_output.rb:14:in `map'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/trace_output.rb:14:in `trace_on'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:328:in `trace'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:183:in `display_error_message'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:169:in `rescue in standard_exception_handling'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:159:in `standard_exception_handling'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
    from /var/lib/gems/1.9.1/gems/rake-10.0.4/bin/rake:33:in `<top (required)>'
    from /usr/local/bin/rake:23:in `load'
    from /usr/local/bin/rake:23:in `<main>'

Caused by line 32 in db/migrate/20090701144013_create_licenses.rb.

fix: sed -i "s/non-commercial, they don.*t have to license their derivative/non-commercial, they don\\\\'t have to license their derivative/" db/migrate/20090701144013_create_licenses.rb