As of 2023-09-09, haskell/action/setup is no longer maintained, please switch to haskell-actions/setup (note: dash for slash).

Pattern synonym with no type signature:

Redundant constraint: Eq a

Pattern match(es) are non-exhaustive

Defined but not used: ‘x’

Pattern match(es) are non-exhaustive

Pattern match(es) are non-exhaustive

The import of ‘Development.IDE.Graph.Classes’ is redundant

Top-level binding with no type signature:

Pattern match(es) are non-exhaustive