Cannot import (*) type operator

The (*) type operator cannot be imported from GHC.TypeLits. The following code compiles in GHC 8.4.4 but fails in GHC 8.6.1 with "error: parse error on input ‘*’"

{-# LANGUAGE TypeOperators #-}
import GHC.TypeLits (type (*))

Trac metadata

Trac field	Value
Version	8.6.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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changed weight to 5

added Tbug Trac import labels

closed

This is expected behavior. You have to enable the new NoStarIsType language extension.

More details here: https://ghc.haskell.org/trac/ghc/wiki/Migration/8.6

I agree that it's unfortunate how this breaks, but it seemed better than other alternatives as we were preparing GHC 8.6.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedInvalid

Ah thank you, my apologies.

added Pnormal label