It's still in the pre-RFC phase, so there's no solid ETA. This was in fact one of the largest blockers, though, so we'll see how it goes. To make the status of MIR more clear:
* 1.11: "old trans" by default, MIR with a flag
* 1.12: MIR by default, "old trans" with a flag
* 1.13: MIR only, "old trans" is gone
Given that we've had 6 weeks so far with MIR-by-default, everything is looking good, but in theory, making it more widely available might turn up issues. If something catastrophic happens, in theory, old trans could be brought back. So we'll see how the next few weeks goes.
That doesn't mean _no_ work has been done on non-lexical lifetimes, see http://smallcultfollowing.com/babysteps/blog/2016/05/09/non-... (that's a link to the last of three posts). But there's still work to write an actual RFC, discuss it, and then land it.
That doesn't mean _no_ work has been done on non-lexical lifetimes, see http://smallcultfollowing.com/babysteps/blog/2016/05/09/non-... (that's a link to the last of three posts). But there's still work to write an actual RFC, discuss it, and then land it.