GHC 8.8 regression: :t in ghci silent
Summary
Under certain circumstances, the :t
command produces no output.
It is unclear what the exact extent of these circumstances is,
but at the very least this arises in ill-kinded contexts
Steps to reproduce
The following command suffices:
:t id :: [Maybe]
Expected behavior
This should (and in GHC 8.6.5 does) complain that Maybe
is not
of kind *
.
Environment
- GHC version used: 8.8.1 (verified nonexistent in 8.6.5)