[isabelle-dev] Deadline for Isabelle2012 release

[Makarius]

Dear all,

things seem to be converging nicely, so the deadline for the critical 
release fork for Isabelle2012 is today:

   02-May-2012 22:00 CEST

This means any changesets pushed before that are for Isabelle2012, any 
after that for the subsequent release.  I recommend to keep a clear 
distance of at least 1h from that point, to avoid confusion about the 
intention.

Afterwards there will be public release candidates of Isabelle2012, also 
announced on isabelle-users.  This testing phase will last for at least 2 
weeks, until the final version can be rolled out.

Any problems that are found in this time can be addressed by clearly 
defined changesets submitted to me via email, and not pushed on the main 
Isabelle repository that is already in post-release mode.  Sometimes it is 
infeasible to adress issues in the short time that is left, and a danger 
to introduce more problems in a rush.  So any change needs to be 
considered carefully.


 	Makarius