'The parameter "debug.error_handler.throw_at" must be defined' error after updating to Symfony 2.6
symfony
Solution
manualy clear application cache - remove all files in /app/cache: `rm -r app/cache/*`
and then warmup cache for needed environment like that:
`app/console cache:warmup --env=prod`
Problem
After updating Symfony with Composer to version 2.6 it gives this error: [Symfony\Component\DependencyInjection\Exception\InvalidArgumentException] The parameter "debug.error_handler.throw_at" must be defined.