[experimental] Remove DeprecationHandler [#3558105]

Problem/Motivation

This is a bit of moonwalking built on top of
#3527936: Introduce support for PHPUnit 12 and
#3497124: Deprecate expectDeprecation(), use PHPUnit's expectUserDeprecationMessage*() instead,
aimed at removing completely the custom deprecation handler that let us currently ignore deprecations that follow the patterns defined in .deprecation-ignore.txt.

Would require that PHPUnit upstream agrees to manage such a pattern file and implements that.

Proposed resolution

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet

Issue fork drupal-3558105

Show commands

Start within a Git clone of the project using the version control instructions.

Add & fetch this issue fork’s repository

Or, if you do not have SSH keys set up on git.drupalcode.org:

Add & fetch this issue fork’s repository

1 hidden branch

3558105-experimental-remove-deprecationhandler

changes, plain diff MR !13849

Check out this branch for the first time

Check out existing branch, if you already have it locally

About issue forks

Comments

Comment #1

16 November 2025 at 10:24

mondrake created an issue. See original summary.

Comment #2

16 November 2025 at 10:27

mondrake opened merge request !13849

Comment #3

16 November 2025 at 10:27

Version:

11.x-dev

» main

Drupal core is now using the main branch as the primary development branch. New developments and disruptive changes should now be targeted to the main branch.