PHP 8 Compatibility Issue

Problem/Motivation

In PHP 8, the errcontext parameter is removed from the handler defined in set_error_handler.

This causes error_page to throw an error when defining the handleError method.

Steps to reproduce

Add set_error_handler(['Drupal\error_page\ErrorPageErrorHandler', 'handleError']); in settings.php

Run with PHP 8

Proposed resolution

Change array $context to array $context = [] in the method handleError.

Remaining tasks

User interface changes

API changes

Data model changes