Safari/Chrome/Chromium: RangeError: Maximum call stack size exceeded (parsing meta Table tags 'appl' and 'bild')

[graphicore]

In Google Chrome/Chromium/Safari attempting to parse a font from Apple (which I can't share/attach) I get an Error:

RangeError: Maximum call stack size exceeded
        //         [...] at decode.UTF8 [...] "

The font in a current macOS Monterey 12.4 is "San Francisco"/"System Font" and located at /System/Library/Fonts/SFNS.ttf (Version 17.0d11e1 can be checked via https://wakamaifondue.com/)

It could be argued that Chrome/Chromium/Safari should handle this case better (Firefox does), however, the implementation can improve here IMO as well.

Expected Behavior

The font should parse without error.

I'm going to send a PR with a possible fix and link here to it: #523

Current Behavior

In src/tables/meta.js the function parseMetaTable tries to parse appl and bild using decode.UTF8.

Both tags, appl and bild are "Reserved — used by Apple" as of the spec. Parsing these does currently not yield a usable result, especially because it doesn't seem to be UTF-8 at all.

In Google Chrome/Chromium/Safari I have seen it fail attempting to parse this with: RangeError: Maximum call stack size exceeded

This indicates that unknown/proprietary tags should not be attempted to parse this way, also, the decode.UTF8 implementation is likely insufficient to parse full UTF-8 (but this would be a different bug), both formats of the the meta tags dlng and slng are documented as: "Text, using only Basic Latin (ASCII) characters", hence there should be no problem.

Possible Solution

Skip parsing of the tags appl and bild, or skip all unknown tags (all but dlng and slng).

Steps to Reproduce (for bugs)

1. open Google Chrome, Chromium or Safari browser
2. go to https://opentype.js.org/
3. open the Apple System Font from /System/Library/Fonts/SFNS.ttf
4. will display message "RangeError: Maximum call stack size exceeded"

Your Environment

• Version used: latest/HEAD/nightly
• Font used: macOS /System/Library/Fonts/SFNS.ttf Version 17.0d11e1
• Browser Name and version:
  • macOS Safari Version 15.5 (17613.2.7.1.8)
  • macOS Google Chrome Version 103.0.5060.114 (Official Build) (arm64)
  • Linux Google Chrome Version 102.0.5005.115 (Official Build) (64-bit)
  • Linux Chromium Version 102.0.5005.115 (openSUSE Build) stable (64-bit)
• Operating System and version (desktop or mobile): macOS Monterey 12.4, GNU+Linux+Gnome3