from_address requires that the provided pointer refer to the suspended coroutine, which doesn't have a type, or at least not one knowable by the user. Therefore every use of `from_address` with a typed pointer is almost certainly a bug. This behavior is a part of the TS specification, but hopefully it will be in the future. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@304172 91177308-0d34-0410-b5e6-96231b3b80d8