On Monday, 15 July 2019 at 11:33:44 UTC, Mike Franklin wrote:
My understanding is the `rt` is the language implementation and `core` is the low level library for users.
This understanding would be mistaken. We haven't been shipping `rt` on the import path for a long time. `core.internal` exists precisely to fill this role, i.e. code that needs to be around at druntime import time, but isn't supposed to be accessed directly by users.
— David
