Change record status: 
Project: 
Introduced in branch: 
8.8.x
Introduced in version: 
8.8.0-alpha1
Description: 

The \Drupal\Core\Cache\BackendChain constructor parameter, $bin, is deprecated.

Example usage

Before

book.cache:
  class: Drupal\Core\Cache\BackendChain
  arguments: ['whatever arbitrary string...']
  ...  

After

book.cache:
  class: Drupal\Core\Cache\BackendChain
  # No 'arguments' array are passed to the service.
  ...  
Impacts: 
Module developers
Site templates, recipes and distribution developers