Steps to reproduce the issue

composer update joomla/framework

Expected result

joomla continues to work

Actual result

Fatal error: Class Joomla\CMS\Application\AdministratorApplication contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Joomla\CMS\Application\CMSApplicationInterface::getSession) in C:\htdocs\joomla-cms\libraries\src\Application\AdministratorApplication.php on line 32

Additional comments

Output from update

C:\htdocs\joomla-cms>composer update joomla/application
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 1 update, 0 removals

• Removing joomla/application (dev-2.0-dev 3d549e0)
• Installing joomla/application (dev-2.0-dev e15eb04): Loading from cache
  Writing lock file

Reverting that update and everything works