8aa3137551
So far, the pretty printer for `std::coroutine_handle` internally dereferenced the contained frame pointer displayed the `promise` as a sub-value. As noticed in https://reviews.llvm.org/D132624 by @labath, this can lead to an endless loop in lldb during printing if the coroutine frame pointers form a cycle. This commit breaks the cycle by exposing the `promise` as a pointer type instead of a value type. The depth to which the `frame variable` and the `expression` commands dereference those pointers can be controlled using the `--ptr-depth` argument. Differential Revision: https://reviews.llvm.org/D132815