WebAssembly streaming API fails with inspector

[peter-jerry-ye]

• Steps to reproduce by slightly altering the example of https://docs.deno.com/runtime/manual/runtime/webassembly/using_streaming_wasm

  • Run curl https://wpt.live/wasm/incrementer.wasm -o incrementer.wasm to get the wasm file
  • Create a file named "index.ts" with following contents:

    const { instance, module } = await WebAssembly.instantiateStreaming(
    fetch(new URL("./incrementer.wasm", import.meta.url)),
    );
    const increment = instance.exports.increment as (input: number) => number;
    console.log(increment(41));

  • Run deno run --inspect-brk --allow-read ./index.ts
  • Visit chrome://inspect to connect to the debugger and execute the program

• Expected output

  • Log 42 on the console

• Actual output

  error: Uncaught (in promise) TypeError: WebAssembly.compile(): Argument 0 must be a buffer source
  at eventLoopTick (ext:core/01_core.js:178:11)

Also tested with VSCode debugger

• Version:
  • Deno 1.38.4
  • Chrome 120.0.6099.71
  • VSCode 1.84.2
  • macOS Sonoma 14.0

[mcgear]

Any news on this? I am getting the same trying to use @deno/graph wasm in a solution.

[Hajime-san]

related https://github.com/denoland/vscode_deno/issues/708