After #2470693: Upgrade to Symfony 2.7.0 cache bins are not more deleted when the module that declares them is uninstalled. This because ModuleInstaller::removeCacheBins() do not take into account the factories definition usage introduced in the upgrade to symfony 2.7
Typical service definition after the upgrade:
cache.xxx:
class: Drupal\Core\Cache\CacheBackendInterface
tags:
- { name: cache.bin }
factory: cache_factory:get
arguments: [xxx] In ModuleInstaller::removeCacheBins() you check for 'factory_service' and 'factory_method' (which are not more used):
if ($tag['name'] == 'cache.bin'&& isset($definition['factory_service']) && isset($definition['factory_method']) && !empty($definition['arguments'])) {
//delete cache bin
}therefore cache bins are never deleted.
This issue affects various core modules (eg toolbar, dynamic page cache, etc) in 8.0, 8.1 and 8.2 branches