[p5.js 2.0 Bug Report]: FES throws an error when processing internal errors, producing confusing output

[davepagurek]

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

p5.js version

2.0.5 (Anything 2.0 and above)

Web browser and version

Firefox 143

Operating system

MacOS

Steps to reproduce this

Steps:

1. Trigger an internal library error, e.g. https://editor.p5js.org/davepagurek/sketches/eR9paTywq (see [p5.js 2.0 Bug Report]: p5.MediaElement.connect throws error: fn is not defined #8173)

The FES output shows two errors, the top one being:

TypeError: can't access property "functionName", stacktrace[(friendlyStack[0].frameIndex - 2)] is undefined

This is due to FES trying to parse the error stack and creating a new error accidentally.