syb fails to compile with ghc 9.0.1 (alpha)

[GeorgeCo]

cabal install syb --allow-new ... [ 7 of 16] Compiling Data.Generics.Twins ( src/Data/Generics/Twins.hs, dist/build/Data/Generics/Twins.o, dist/build/Data/Generics/Twins.dyn_o )

src/Data/Generics/Twins.hs:290:58: error: • Couldn't match type: b0 -> Ordering with: forall a3. Data a3 => a3 -> Ordering Expected: a2 -> GenericQ Ordering Actual: a2 -> b0 -> Ordering • In the first argument of ‘gzipWithQ’, namely ‘gcompare'’ In the first argument of ‘mconcat’, namely ‘(gzipWithQ gcompare' x y)’ In the second argument of ‘mappend’, namely ‘mconcat (gzipWithQ gcompare' x y)’ | 290 | nX compare nY mappend mconcat (gzipWithQ gcompare' x y) | ^^^^^^^^^ cabal: Failed to build syb-0.7.1. See the build log above for details.

[GeorgeCo]

issue is still true with ghc 9.0 rc1

[amesgen]

This has been resolved by #25, or am I missing sth?

[konn]

The current master branch compiles with GHC 9.0.1 on my environment (macOS), great! By the way, is there any schedule for uploading a new version with GHC 9 support on Hackage?

[amesgen]

0.7.2.1 has been released with GHC 9 compat: https://hackage.haskell.org/package/syb-0.7.2.1

(note that I took no part in that, just a remark that this issue can be closed if I am not mistaken)

[konn]

Great, thanks!

[andreasabel]

Issue can be closed.