{
  "$type": "site.standard.document",
  "bskyPostRef": {
    "cid": "bafyreiarwgduxfv44llfme55eufalflzu4mw4wscrlk7x66h73e4fqtuum",
    "uri": "at://did:plc:pi6woz4d47bkuws673w2il2r/app.bsky.feed.post/3mosvnezlxg72"
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  "path": "/t/error-ghc-91510-illegal-polymorphic-type/14304#post_4",
  "publishedAt": "2026-06-21T17:26:16.000Z",
  "site": "https://discourse.haskell.org",
  "tags": [
    "GHC-02550"
  ],
  "textContent": "This tells me I can’t do this because `Objects` is a constraint _family_. The error page for GHC-02550 suggests turning `Objects` into its own class, but then, how do I turn `instance Objects (->) x` into, say, `Ord x`?",
  "title": "Error GHC-91510: illegal polymorphic type"
}