TYPO3 Core

Not a bug, but a changed behavior.

Deprecations now use the normal logging API so it can all be controlled the usual way.

See also: https://docs.typo3.org/typo3cms/extensions/core/latest/Changelog/9.0/Deprecation-82438-DeprecationMethods.html

How to configure logging can be found in: https://docs.typo3.org/typo3cms/CoreApiReference/ApiOverview/Logging/Configuration/Index.html#writer-configuration

The scope used by the Core is "TYPO3.CMS.deprecations".

The default configuration is:

    'LOG' => [
        'writerConfiguration' => [
            \TYPO3\CMS\Core\Log\LogLevel::WARNING => [
                \TYPO3\CMS\Core\Log\Writer\FileWriter::class => []
            ]
        ],
        'TYPO3' => [
            'CMS' => [
                'deprecations' => [
                    'writerConfiguration' => [
                        \TYPO3\CMS\Core\Log\LogLevel::NOTICE => [
                            \TYPO3\CMS\Core\Log\Writer\FileWriter::class => [
                                'logFileInfix' => 'deprecations'
                            ],
                        ]
                    ]
                ]
            ]
        ],
    ],