EOF while parsing a value at line 1 column 0

[matthewwren]

What version? (function-runner --version): 5.0.0

Problem

I get an error EOF while parsing a value at line 1 column 0 when trying to run function-runner. I am on Windows 11. I have tried a variety of things including using the Remix Template for the app and using the products_discounts template for the extension, and using JavaScript and TypeScript. I have also tried using both empty and populated json input via both stdin and an input file.

Error Message and Context

{
  "name": "function.wasm",
  "size": 2,
  "memory_usage": 0,
  "instructions": 100419,
  "logs": "",
  "output": {
    "InvalidJsonOutput": {
      "error": "EOF while parsing a value at line 1 column 0",
      "stdout": ""
    }
  }
}

Steps to reproduce

• In terminal I run shopify app init
• I accept the default app name by pressing tab
• I select Start by adding your first extension
• I cd to app directory
• I run shopify app generate extension
• I select y to create as a new app
• I accept the default app name by pressing tab
• I select Cart transformer
• I accept the default name by pressing tab
• I select TypeScript
• I run shopify app dev
• I select my dev store
• I click the preview url and click the Install button
• I then cd to the dist folder of the extension
• I run echo '{}' | function-runner --function function.wasm --json

[meditto]

I have the same issue

[meditto]

I have the same issue

we have to specify the name of the export we want to invoke, I fixed my issue by adding this -e run

[DuncanUszkay1]

Should be fixed on CLI's nightly! Please re-open if you run into further issues

[mariusa]

@DuncanUszkay1 getting the same with version 8.0.1. Adding the export fixes it.