Work around a compiler bug w/ coroutines and exceptions (microsoft#9893)

There is a bug in the compiler that we trip over when we handle the
exception generated by Package::Current inside a coroutine. It appears
to destruct an invalid instance of winrt::factory_guard_count.

Learned from the compiler folks: "coroutine frame pointer wasn't being
stored ... properly".

Fixes microsoft#9821

(cherry picked from commit 21b2e01)

Work around a compiler bug w/ coroutines and exceptions (microsoft#9893)

There is a bug in the compiler that we trip over when we handle the
exception generated by Package::Current inside a coroutine. It appears
to destruct an invalid instance of winrt::factory_guard_count.

Learned from the compiler folks: "coroutine frame pointer wasn't being
stored ... properly".

Fixes microsoft#9821

(cherry picked from commit 21b2e01)