我知道this decision并尝试了所有建议，
-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-2.0.0
-----> Installing dependencies using 1.5.2
New app detected loading default bundler cache
Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
Fetching gem metadata from https://rubygems.org/..........
Fetching additional metadata from https://rubygems.org/..
Could not find thread_safe-0.3.0 in any of the sources
1）尝试完全卸载thread_safe 2）安装不同的版本 - 0.2.0和0.3.1
但我无法将应用程序部署到heroku
有什么想法吗？