1.9.3p0 is out. We should update the 1.9 Standard Library to this version.
Charlie executed this on the master branch. 3b60780
I don't know if it should be cherry-picked to the 1.6 branch for 1.6.6.
I'm resolving this for now.
I don't think so. Swapping out the entire stdlib for 1.9.3 would be, in my opinion, too big a change for 1.6.x. If there's specific fixes we should backport, we can do that...but the full 1.9.3 move will be for JRuby 1.7.