As of 2023-09-09, haskell/action/setup is no longer maintained, please switch to haskell-actions/setup (note: dash for slash).

In the use of ‘head’

The import of ‘foldl'’ from module ‘Data.List’ is redundant

In the use of ‘head’

Pattern match(es) are non-exhaustive

Pattern match(es) are non-exhaustive

In the use of ‘head’

The import of ‘foldl'’ from module ‘Data.List’ is redundant

In the use of ‘head’

In the use of ‘head’

In the use of ‘head’

In the use of ‘head’

Badly staged type: a is bound at stage 1 but used at stage 2

Badly staged type: e is bound at stage 1 but used at stage 2