blob: 5ec4355fbe2a160b8446e5b5052654dacde896b5 (
plain)
1
2
3
4
5
6
7
8
|
mod41.hs:3:18:
Illegal instance declaration for `Eq (Either a a)'
(All instance types must be of the form (T a1 ... an)
where a1 ... an are *distinct type variables*,
and each type variable appears at most once in the instance head.
Use -XFlexibleInstances if you want to disable this.)
In the instance declaration for `Eq (Either a a)'
|
