[Haskell-cafe] shorter error messages

[Henning Thielemann]

On Tue, 16 Mar 2021, Ben Franksen wrote:

> Is there a way to tell ghc to print errors, especially type errors in a
> more concise way? Ideally one or two lines of text? I hate it when I
> have to scroll several pages of text just to see the next/previous error
> location.

It has become especially worse since undefined identifiers are now 
sometimes handled by the type checker. A simple "xyz is not defined" can 
now consume many pages of follow-up type errors.