Drupal Release: 8.6.9

TL;DR

Drupal 8.6.9: Bug Fix Release

This minor release addresses critical bugs affecting updates and Internet Explorer 11 compatibility. It fixes an unserializer issue that caused warnings when updating from 8.6.7 to 8.6.8, and resolves a regression affecting IE11 users. This maintenance release ensures smoother updates and better browser compatibility without introducing new features.

Highlight of the Release

• Fixed serialization warnings when updating from Drupal 8.6.7 to 8.6.8
• Resolved regression affecting Internet Explorer 11 compatibility
• Improved update process stability

Migration Guide

No migration steps are required for this release. This is a standard bug fix release that can be applied through the normal update process.

To update to Drupal 8.6.9:

1. Back up your site's files and database
2. Put your site into maintenance mode
3. Update Drupal core using your preferred method (Composer, Drush, or manual update)
4. Run the database updates
5. Take your site out of maintenance mode

No special migration steps are needed beyond the standard update procedure.

Upgrade Recommendations

This release fixes critical bugs affecting updates and Internet Explorer 11 compatibility.

Priority: Medium

All sites running Drupal 8.6.8 or earlier versions in the 8.6.x branch should upgrade to this release, especially if:

• You are planning to update from 8.6.7 to a newer version
• You have users who access your site using Internet Explorer 11

There are no known regressions in this release, making it a safe update for all Drupal 8.6.x sites.

Bug Fixes

Serialization Warning Fix

Fixed an issue where updating from Drupal 8.6.7 to 8.6.8 would produce warnings related to Drupal\Core\Extension\Extension having no unserializer. This issue (ID #3031128) was causing problems during the update process and has now been resolved.

Internet Explorer 11 Compatibility

Addressed a regression (Issue #2215857) that was affecting functionality for users on Internet Explorer 11. This fix ensures that Drupal sites continue to work properly for users of this browser.

New Features

No new features were introduced in this maintenance release. Drupal 8.6.9 focuses exclusively on bug fixes and compatibility improvements.

Security Updates

No security fixes were included in this release. For the latest security information, always refer to the official Drupal Security Advisories.

Performance Improvements

No specific performance improvements were included in this release. The focus was on fixing critical bugs related to updates and browser compatibility.

Impact Summary

Drupal 8.6.9 is a targeted bug fix release that addresses two specific issues: serialization warnings during updates from 8.6.7 to 8.6.8, and a regression affecting Internet Explorer 11 users.

The update serialization fix resolves an issue where the Drupal\Core\Extension\Extension class had no unserializer, causing warnings and potential problems during the update process. This ensures smoother updates for site administrators.

The Internet Explorer 11 fix addresses a regression that was affecting functionality for users on this browser. While IE11 usage continues to decline, many enterprise environments and some government agencies still rely on it, making this fix important for sites with such audiences.

This release contains no new features, security fixes, or API changes, focusing exclusively on maintaining compatibility and fixing bugs. The changes are minimal and targeted, making this a low-risk update that improves stability without introducing new functionality.