All that's required is a little more debugging. This release can compile in the background. The stress test runs again but when Exupery starts compiling itself using the background compiler after a few minutes it stops due to a bug. I'd like to be able to run the background compiler for at least an hour before releasing.
Exupery is probably more reliable now than it's been before. The other part of this release has been fixing some old stack tracing bugs. That introduced block finder bugs which have been fixed along with some old block finder bugs. By the standards of previous releases, it would be releasable now.
I'm thinking about freeing up the "unused" slot in MethodContext so that Exupery can be loaded in an image running the closure compiler without causing crashes. More work would be required to compile closure compiler code.
Bryce