Error Source Finder

🔍 What is ErrorSourceFinder?

ErrorSourceFinder is a tiny, powerful debugging addon that helps you instantly identify which addon is generating Lua errors.
It works on:

• Classic Era (1.15.x)

• MoP Classic (5.4.8)

• Retail ( War Within)

No setup required — install and it automatically starts detecting error sources.

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⭐ Features

✔ Detects the addon responsible for each Lua error

When an error happens, the addon scans the file path and call stack to determine which addon folder the error came from.

✔ Shows the addon name in chat

Example:

  [ErrorSourceFinder] Error in addon: WeakAuras

✔ Keeps a short error history

Use /esf to view the most recent 5 errors:

• Timestamp

• Source addon

• Full error message

✔ Works with every version of WoW

Thanks to a multi-interface TOC, the addon runs on Classic Era, MoP Classic, and Retail automatically.

✔ No performance overhead

The addon only runs when the Blizzard error handler triggers.

✔ Compatible with all debugging tools

Works fine alongside:

• BugGrabber

• BugSack

• DevTools

• Swatter

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🧰 Slash Commands

Show last errors:

  /esf

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📦 Installation

Drop the folder into:

Windows (Retail):

  World of Warcraft/_retail_/Interface/AddOns/

Windows (Classic Era / Wrath / Cata / MoP):

  World of Warcraft/_classic_/Interface/AddOns/

Enable Display Lua Errors in:
ESC → Interface → Help

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🔧 Technical Notes

This addon uses:

• seterrorhandler() to intercept errors

• Filepath scanning to identify addon folders

• Safe fallback when the source cannot be detected

No taint, no frames, no saved variables — completely clean.

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🧑‍💻 Author

Nekminute

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🟫 Supported Versions (CurseForge “Game Versions” Checklist)

Check the following:

Retail

• The War Within

Classic

• Classic Era

• MoP Classic