Henning Thielemann
On Fri, 8 May 2020, Niklas Hambüchen wrote:
On 5/8/20 5:37 PM, Henning Thielemann wrote:
a callstack is not useful for a user.
Call stacks have been very useful to me as a user of non-Haskell tools so far, because they are excellent for attaching to bug reports and usually led to developers fixing my problems faster.
This confirms that they are not for you, but you only forward them to the developer.
Can someone please give me examples where current state lacks and how they are addressed by the proposal(s)?
We can debate whether partial functions like `fromJust` should exist; however, the fact of the matter is that they do exist and they are used. Furthermore, even `base`'s own IO library (e.g. `openFile`) uses synchronous exceptions to report errors. This becomes particularly painful when building large systems: Even if I am careful to avoid such functions in my own code, as my dependency footprint grows it becomes more likely that some transitive dependency will expose a partial interface (perhaps even without my knowledge). This is a problem that industrial users are all too familiar with. Perhaps this helps to shed some light on the motivation? Cheers, - Ben