Nothing has changed specifically in Mars M2. You didn't miss an announcement.
What you see is probably a combination of https://bugs.eclipse.org/423882 : fixed workspace version checks and improved dialogs that tell about potential problems https://bugs.eclipse.org/441497 : we missed to update platform feature versions in time for Mars M1, so you only get the dialog in M2. The explained "incompatibility" matches the "Workspace Compatibility" policy outlined in the readme: https://www.eclipse.org/eclipse/development/readme_eclipse_4.4.php#Compatibility Switching back to older Eclipse versions has never been officially supported. It works on a "best effort" basis -- in practice, it's often working fine, but it's not well tested and hence more risky than just moving forward. => What has changed is that you are now informed about the risks. HTH Markus [email protected] wrote on 2014-10-05 15:03:53: > From: Ed Willink <[email protected]> > To: [email protected] > Date: 2014-10-05 15:04 > Subject: [cross-project-issues-dev] Incompatible workspace upgrade > Sent by: [email protected] > > Hi > > Did I miss an announcement? > > After attempting to use M2, I get a: we are going to upgrade your > workspace incompatibly warning. So I won't be using M2 for normal work. > What are the incompatibilities? I need my workspace to be multiple > version compatible so that I can investigate regressions. > > Regards > > Ed Willink > _______________________________________________ > cross-project-issues-dev mailing list > [email protected] > To change your delivery options, retrieve your password, or unsubscribe from this list, visit > https://dev.eclipse.org/mailman/listinfo/cross-project-issues-dev > _______________________________________________ cross-project-issues-dev mailing list [email protected] To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/cross-project-issues-dev
