Drupal 11.2 broke backwards-compatibility with phpstan.
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires drupal/core-dev 11.2.2 -> satisfiable by drupal/core-dev[11.2.2].
- Root composer.json requires jangregor/phpstan-prophecy ^1 -> satisfiable by jangregor/phpstan-prophecy[1.0.0, 1.0.1, 1.0.2].
- drupal/core-dev 11.2.2 requires phpstan/phpstan ^2.1.17 -> satisfiable by phpstan/phpstan[2.1.17, ..., 2.1.x-dev].
- jangregor/phpstan-prophecy[1.0.0, ..., 1.0.2] require phpstan/phpstan ^1.0.0 -> satisfiable by phpstan/phpstan[1.0.0, ..., 1.12.x-dev].
- You can only install one version of a package, so only one of these can be installed: phpstan/phpstan[1.0.0, ..., 1.12.x-dev, 2.0.0, ..., 2.1.x-dev].
Update development dependencies and fix any usages to work again.
Active
3.1
Code
Issue #3538760 by mradcliffe: Fix phpunit test failures on Drupal 11.2