Wasmer: Getting I/O error when running quickjs (works on wasmtime)

[saghul]

Describe the bug

Running the QuickJS example fails with i/o error:

 wasmer run --dir=examples/ build/qjs.wasm -- examples/hello_world.js
examples/hello_world.js: I/O error

Source: https://github.com/saghul/wasi-lab/tree/master/qjs-wasi

wasmer 0.5.6 | rustc 1.35.0 (3c235d560 2019-05-20) | x86_64

Steps to reproduce

1. Clone https://github.com/saghul/wasi-lab/
2. Go into qjs-wasi
3. Build with ./buils.sh
4. Run with the command above
5. See the error

Expected behavior

The following is printed:

Hello World
fib(10)= 55

Actual behavior

I/O error

Additional context

N/A

[saghul]

qjs.wasm.zip

Here is the wasm file, in case that helps debug faster.

Ping @syrusakbary :-)

[MarkMcCaskey]

Hi! Thanks for reporting this!

I actually have a PR open that's rewriting and improving a ton of our WASI FS code, #555 , and I just tested it and your example works there!

The PR is getting into good shape, I'm just trying to write a lot of tests to cover as many branches of the internal logic as I can to make sure I don't break anything that's already working and to make sure we don't break them going forward.

When we ship it, we'll release a new version of Wasmer because it's a huge improvement. Optimistically that might be today, but it may be early next week.

[saghul]

This is fantastic news, thank you! 🚀

[syrusakbary]

This issue is now fixed on wasmer 0.5.7.

You can update wasmer locally with:

wasmer self-update

Let us know if everything is ready for publishing into wapm 🎉

[saghul]

This is one is fixed, that was fast! ❤️

[Munawwar]

So quickjs seems to compiled to wasm but can't seem to load/instantiate it -> https://github.com/saghul/wasi-lab/issues/2
(tried python and ruby wasm ext libraries)