2016-07-05 20:36 GMT+02:00 Michael Steinberg <michsteinb@gmail.com>:

a) not documented

http://www.boost.org/doc/libs/1_61_0/libs/coroutine2/doc/html/coroutine2/coroutine/asymmetric.html
'Code executed by coroutine-function must not prevent the propagation of the detail::forced_unwind exception. Absorbing that exception will cause stack unwinding to fail. Thus, any code that catches all exceptions must re-throw any pending detail::forced_unwind exception.'

Oh well, I should have noted that we're going directly with context::execution_context now, in whose documentation I could not find this.