TypeError with Twig 3.30.0 upgrade: EscaperRuntime::escape() Argument #4 ($autoescape) must be of type bool, null given

Problem/Motivation

After upgrading Twig from 3.29.0 to 3.30.0 (via composer update --with-dependencies), Drupal 11.4.7 sites throw a TypeError on every page request (front-end and admin):

TypeError: Twig\Runtime\EscaperRuntime::escape(): Argument #4 ($autoescape) must be of type bool, null given, called in .../sites/default/files/php/twig/... on line 58 in Twig\Runtime\EscaperRuntime->escape() (line 94 of vendor/twig/twig/src/Runtime/EscaperRuntime.php).

Twig 3.30.0 made the $autoescape parameter of EscaperRuntime::escape() stricter (now requires bool). Previously compiled Twig templates (from 3.29.0) still pass null, causing the failure.

Steps to reproduce

1. On Drupal 11.4.7 + PHP 8.3, run composer update --with-dependencies (this upgrades twig/twig from 3.29.0 to 3.30.0).
2. Visit any page (front-end or admin).
3. Observe the TypeError above.

Proposed resolution

• Investigate whether Drupal’s Twig integration needs updates for Twig 3.30.0’s stricter type requirements.

Workaround:

composer require "twig/twig:3.29.0" --no-update
composer update twig/twig
drush cr

After this, the site works normally with Twig 3.30.0.

Remaining tasks

• Decide on automatic cache clearing vs. documentation.
• Confirm whether any Drupal code needs changes for Twig 3.30.0 compatibility.

User interface changes

None

API changes

None

Data model changes

None

Release notes snippet

Twig 3.30.0 introduces a stricter type requirement on EscaperRuntime::escape(). Sites upgrading from 3.29.0 must clear the compiled Twig cache (rm -rf sites/default/files/php/twig/* + drush cr) or the site will fatal with a TypeError.