Re: Proposal: Add HasCallStack to the partial functions in base

On Thu, 27 Sep 2018, David Feuer wrote:

I mostly think this is a good idea. However, some care is required to prevent performance problems, especially in recursive functions. Watch out in implementation! Also, these partial functions are sometimes used in non-obviously total contexts, such as the implementation of mfix for lists.

All partial functions must eventually be used in total contexts - otherwise your program can crash.