Duncan Coutts authored 11 months ago and Marge Bot committed 11 months ago

All the changes are in fact not changes at all.

Previously, the IoSubSystem data type was defined in GHC.RTS.Flags and
exported from both GHC.RTS.Flags and GHC.IO.SubSystem. Now, the data
type is defined in GHC.IO.SubSystem and still exported from both
modules.

Therefore, the same exports and same instances are still available from
both modules. But the base-exports records only the defining module, and
so it looks like a change when it is fully compatible.

Related: we do add a deprecation to the export of the type via
GHC.RTS.Flags, telling people to use the export from GHC.IO.SubSystem.

Also the sort order for some unrelated Show instances changed. No idea
why.

The same changes apply in the other versions, with a few more changes
due to sort order weirdness.