Herokuでrakeがころぶ

Ruby Heroku

タイトルのまんまです。お手上げ寸前。
そういえば、少し前にHerokuのBundlerのバージョンが1.0.0.rc.2に上がってました。なのでrails 3.0.0.rcのままでもデプロイできます。
rakeがうまくいかないのは、"Rails 3 doesn't officially support Ruby 1.9.1"って言ってるししょうがないんですかね。

% cat Gemfile
source 'http://rubygems.org'

gem 'rails', '3.0.0.rc'
gem 'sqlite3-ruby', :require => 'sqlite3'
gem 'mongoid', '2.0.0.beta.15'
gem 'bson_ext'
gem 'oauth'
gem 'json'

% cat Rakefile
# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

require File.expand_path('../config/application', __FILE__)
require 'rake'

Rsss::Application.load_tasks

% cat lib/tasks/cron.rake
task :cron => :environment do
  puts 'piyo'
end

% heroku rake cron --trace
    Rails 3 doesn't officially support Ruby 1.9.1 since recent stable
    releases have segfaulted the test suite. Please upgrade to Ruby 1.9.2
    before Rails 3 is released!

    You're running
      ruby 1.9.1p129 (2009-05-12 revision 23412) [x86_64-linux]

/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:32: warning: already initialized constant RAKEVERSION
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:404: warning: already initialized constant EMPTY_TASK_ARGS
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:452: warning: already initialized constant EMPTY
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:960: warning: already initialized constant RUBY_EXT
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:964: warning: already initialized constant RUBY 
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1033: warning: already initialized constant LN_SUPPORTED
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1242: warning: already initialized constant ARRAY_METHODS
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1245: warning: already initialized constant MUST_DEFINE
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1249: warning: already initialized constant MUST_NOT_DEFINE
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1253: warning: already initialized constant SPECIAL_RETURN
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1259: warning: already initialized constant DELEGATING_METHODS
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1569: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1575: warning: already initialized constant DEFAULT_IGNORE_PROCS
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1612: warning: already initialized constant FileList
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1638: warning: already initialized constant EARLY
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1968: warning: already initialized constant DEFAULT_RAKEFILES
rake aborted!
stack level too deep 
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
<<中略>>
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/core_ext/time/calculations.rb:282:in `compare_with_coercion'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1650:in `<=>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:93:in `>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:93:in `block (3 levels) in <top (required)>'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1268:in `select'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1268:in `select'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:93:in `block (2 levels) in <top (required)>'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake/testtask.rb:91:in `initialize'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:91:in `new'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:91:in `block in <top (required)>'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1882:in `in_namespace'
/usr/ruby1.9.1/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:910:in `namespace'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/testing.rake:86:in `<top (required)>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:215:in `load'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:215:in `block in load'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:205:in `block in load_dependency'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:570:in `new_constants_in'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:205:in `load_dependency'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/activesupport-3.0.0.rc/lib/active_support/dependencies.rb:215:in `load'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/test_unit/railtie.rb:12:in `block in <class:TestUnitRailtie>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/railtie.rb:184:in `call'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/railtie.rb:184:in `each'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/railtie.rb:184:in `load_tasks'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/application.rb:140:in `block in load_tasks'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/application/railties.rb:11:in `each'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/application/railties.rb:11:in `all'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/application.rb:140:in `load_tasks'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/railties-3.0.0.rc/lib/rails/application.rb:77:in `method_missing'
/disk1/home/slugs/258233_f2821a9_8ba0/mnt/Rakefile:7:in `<top (required)>'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2383:in `load'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2017:in `block in load_rakefile'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2000:in `block in run'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/home/slugs/258233_f2821a9_8ba0/mnt/.bundle/gems/ruby/1.9.1/gems/rake-0.8.7/bin/rake:31:in `<top (required)>'
/usr/ruby1.9.1/bin/rake:19:in `load'
/usr/ruby1.9.1/bin/rake:19:in `<main>'
(in /disk1/home/slugs/258233_f2821a9_8ba0/mnt)