Calg's Ready Check Fix

Ever started a ready check in the open world and been slapped with a red Lua error? This makes it stop.

Blizzard's own ready-check code has a bug on Classic Era: when someone hits ready check while you're out in the world (not in a dungeon or raid), the game trips over a missing difficulty value and throws an error like:

bad argument #1 to '?' (Usage: ...) in function 'ShowReadyCheck'

Calg's Ready Check Fix quietly patches that one code path so the error never shows up. The ready-check window itself works exactly as it always has — you just stop getting the pop-up.

Why you'll want it

No more red error spam. Ready checks in the open world stop throwing a Lua error.
Completely silent. No window, no minimap button, no slash commands, no settings — install it and forget it exists.
Feather-light. One tiny file. It does its work at login and then gets out of the way.
Surgical, not sloppy. The fix is scoped to only the ready-check call, so nothing else in your UI is touched and there's no lingering taint on shared game functions.

Getting started

Install the addon.
That's it. There's nothing to configure — the next open-world ready check just works.

Notes

Built for WoW Classic Era.
This works around a bug in Blizzard's default UI. If Blizzard ever fixes it on their end, this addon simply becomes harmless and can be removed.
Found a bug or have an idea? Leave a comment — feedback is welcome.