RequestHalted

Ends a controller run whose response is already written: the error page, the redirect header or the JSON body went out, and nothing may follow it.

SymfonyRouter::process() catches it and returns, which is what the exit it replaces used to do. It is an Error rather than an Exception on purpose: controllers wrap backend calls in catch (Exception) blocks, and a halt raised inside one of those must not be mistaken for a failed call.

The kind and target say which site halted, so a test can assert on them.