This is a test of wasm-tools compose/wac when composing wasi-virt with custom component.

The custom component has a simple my-sleep func that returns a custom pollable see world.wit.

To run:

./run_wasm_tool.sh
# or ./run_wac.sh

Expected result in two files component.wasm and component.virt.wasm.

To test the generated output:

cargo r -p runner component.wasm        # should print "before sleep" and "after sleep"
cargo r -p runner component.virt.wasm   # should panic (wasi-virt has clock disabled)

---

Actual result:

wasm-tools compose fails with:

[2024-09-26T18:01:25Z WARN ] instance `pollable` will be imported because a dependency named `pollable` could not be found
[2024-09-26T18:01:25Z WARN ] instance `my-sleep` will be imported because a dependency named `my-sleep` could not be found
thread 'main' panicked at /Users/brian/.cargo/registry/src/rsproxy.cn-0dccff568467c15b/wasm-compose-0.217.0/src/encoding.rs:616:21:
internal error: entered unreachable code: should have been handled in `TypeEncoder::component_entity_type`
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

wac fails with:

error: encoding produced a component that failed validation

Caused by:
    type mismatch for import `pollable`
    resource types are not the same (ResourceId { globally_unique_id: 2, contextually_unique_id: 1 } vs. ResourceId { globally_unique_id: 2, contextually_unique_id: 110 }) (at offset 0x1e58e5)

Test Environment:

• wasm-tools 1.217.0
• wac-cli 0.6.0
• wasi-virt 02de7b49
• ./wasm/host.wasm is generated using: wasi-virt --out wasm/virt.wasm --allow-stdio
• ./wasm/wasi_snapshot_preview1.reactor.wasm