rails/master is now 4.0.0.beta and will only support Ruby 1.9.3+
As a fair warning, we won't be accepting pull requests that converts from 1.8 to 1.9 syntax (like the hash or proc syntax). It will just mess Git history and add a bunch of noise when we must focus on 3.2 regressions.
Agree. Thank you @josevalim!
wow, that is crazy to support only 1.9.3, I totally agree thou.
lot's of folks will go crazy thou since most distros barely have 1.9.2 on their repo.
.. and push the use of RVM or rubyenv
Ruby 1.9.3 is available in Debian testing