Change record status: 
Project: 
Introduced in branch: 
10.2.x
Introduced in version: 
10.2.5
Description: 

Drupal Core now uses the PHP format instead of NEON for its PHPStan baseline.

To generate a new baseline from the root of the Drupal repository run

vendor/bin/phpstan analyze --configuration=./core/phpstan.neon.dist --memory-limit=-1 --generate-baseline=core/.phpstan-baseline.php

View the PHPStan in Drupal Core documentation page for more details of how PHPStan is used in Drupal Core.