"Uncaught (in promises) TypeError" with 0.4.x from browser

[MattMatic]

I have projects that work with HBJS 0.3.6 (hbjs.js and hb.wasm).

However, updating both hbjs.js + hb.wasm to version 0.4.0+ produces an error:

Uncaught (in promise) TypeError: WebAssembly.instantiate(): Imports argument must be present and must be an object

This even happens with the repository examples/nohbjs.html and examples/hbjs.example.html with no modifications.

Details:

• Occurs with any 0.4.x
• Win11Pro, Edge
• Occurs with local html file (& remote hb.wasm), or running from local web server.
• FWIW, projects are single HTML file with JavaScript, and nothing extra, using same WebAssembly.instantiate as in HBJS Demo/index.html
• Fails also with the WebAssembly.instantateStreaming method outlined in README.md
• (Similar error with Safari - only with 0.4.x, not 0.3.6)

Any clues would be very helpful! Thank you 😊

[khaledhosny]

I probably broke it with #97. I don’t really understand much of this, I’m afraid.

[MattMatic]

More detail on the error: Uncaught (in promise) TypeError: WebAssembly.instantiate(): Import #0 "wasi_snapshot_preview1": module is not an object or function

The wasi_snapshot_preview1 is new to 0.4.x. I can see it, along with some other hooks, in a hex dump of hb.wasm,

But it might be due to including something that needs a standard file I/O hook, or some other environment hook for standard system calls. action_abort and action_terminate seem to be linked to this (I added --profiling-funcs to the em++ parameters then used wasm-objdump -d hb.wasm > hb.wasm.dis to get a disassembly)

Trying to understand it all myself! 😊