Playground throws DataCloneError on Safari

[matvp91]

Describe the bug
Ran playground (https://ffmpegwasm.netlify.app/playground/) on Safari 15.6.1 and it halts after loading the wasm bundle. A DataCloneError is thrown in console.

To Reproduce
Steps to reproduce the behavior:

1. Go to playground on Safari
2. Wait until the error throws in console.

Expected behavior
The wasm bundle should load on Safari.

Desktop (please complete the following information):

• OS: macOS Monterey
• Browser: Safari
• Version: 15.6.1

[jeromewu]

Hmm, it is tricky that I have no MacOS machine to test this one.

[matvp91]

Ran a local build and put several BP's to trace execution, the underlying error is: message: "Aborted(CompileError: WebAssembly.Module doesn't parse at byte 3: can't get Function local's type in group 0, in function at index 11)…" which happens when the worker receives a message with type=LOAD. My wasm / emscripten knowledge is fairly limited but this points to the following issue: emscripten-core/emscripten#18043

[matvp91]

@jeromewu does this sound familiar? Might make it compatible by modifying compile params. I'd be happy to test as I have macOS.