Data.Text.Show.singleton fails to CPR in GHC 9.0.1

It appears that Data.Text.Show.singleton_ fails to be recognized as possessing the CPR property in GHC 9.0. Consequently, in 9.0.1 its worker has type:

$wsingleton_ :: Char# -> Text

whereas in 8.10.4 it had type:

$wsingleton_ :: Char# -> (# GHC.Prim.ByteArray#, GHC.Prim.Int#, GHC.Prim.Int# #)

This causes the strict all_dropWhileEnd_singleton inspection-testing test of Bodigrim's branch to fail.

Edited May 10, 2021 by Ben Gamari

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information