Problem/Motivation
The fix in #3031128: Update from 8.6.7 to 8.6.8 warnings - Drupal\Core\Extension\Extension has no unserializer is partial for Drush 8. This is because Drush 8 calls update_check_incompatibility() after certain static caches are set in for extension lists.
To test:
- Install Drupal 8.6.7
- Update codebase to Drupal 8.6.9
- Run drush updb (using version 8.1.18)
- Visit admin/reports/status
Proposed resolution
Also clear the profile extension list static cache in UpdateKernel::fixSerializedExtensionObjects()
Remaining tasks
User interface changes
None
API changes
None
Data model changes
None
Release notes snippet
N/a