Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, haskell/actions/setup@v2, actions/cache@v1. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/cache@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

As of 2023-09-09, haskell/action/setup is no longer maintained, please switch to haskell-actions/setup (note: dash for slash).

Noncanonical ‘pure = return’ definition detected

Noncanonical ‘return’ definition detected

In the use of ‘pTraceOpt’ (imported from Debug.Pretty.Simple):

Pattern match(es) are non-exhaustive

Noncanonical ‘pure = return’ definition detected

Noncanonical ‘return’ definition detected

Pattern match(es) are non-exhaustive

Pattern match(es) are non-exhaustive

The prefix use of a ‘$’ would denote an untyped splice