Symfony is updated to 2.8

Various symfony components got updated to version 2.8

Dependency injection: The scope feature is deprecated

Scoped services are deprecated (and removed in 3.0). The alternative is to provide stacked services, like the RequestStack

Dependency injection: The prototype scope is replaced with a shared flag

See:

 feed.reader.dublincoreentry:
     class: Zend\Feed\Reader\Extension\DublinCore\Entry
-    scope: prototype
+    shared: false

Some services are explicitly marked as deprecated using

deprecated: true

Drupal though, opts out of that behaviour for its own service (entity.manager), because symfony throws deprecation errors by default.

A more detailed list of changes can be found on https://github.com/symfony/symfony/blob/2.8/CHANGELOG-2.8.md