Unpack warning when building GHC
@alanz reports on ghc-devs:
I have seen the following warning on master for some time
compiler/GHC/Core/TyCon.hs:1540:5: warning: • Ignoring unusable UNPACK pragma on the first argument of ‘BoxedRep’ • In the definition of data constructor ‘BoxedRep’ In the data type declaration for ‘PrimRep’ | 1540 | | BoxedRep {-# UNPACK #-} !(Maybe Levity) -- ^ Boxed, heap value | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Is it something that needs to be fixed? Can the code be updated to remove the warning?
I'll fix it