Module build failed: UnhandledSchemeError when using gatsby function

[Talaxy009]

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/gatsbyjs/gatsby/issues
• This issue is not a question, feature request, RFC, or anything other than a bug report directly related to Gatsby. Please post those things in GitHub Discussions: https://github.com/gatsbyjs/gatsby/discussions

Description

I'm trying to write a gatsby function, but it seems like webpack can't compile it.

I have create a repo which is base on hello-world starter and add a tiny function in it to reproduce this issue, you can find the link below.

Reproduction Link

https://github.com/Talaxy009/gatsby-function-issue

Steps to Reproduce

1. Clone Reproduction Link
2. Install dependencies
3. Run gatsby develop
4. Visit http://localhost:8000/api/hello
5. You should be able to see the error from the browser and console

Expected Result

The /api/hello should return "hello"

Actual Result

The /api/hello return error message from webpack

Environment

System:
    OS: Windows 10 10.0.22621
    CPU: (12) x64 AMD Ryzen 5 3600 6-Core Processor              
  Binaries:
    Node: 18.16.1 - ~\AppData\Local\Temp\xfs-98c1ccf6\node.CMD
    Yarn: 3.6.3 - ~\AppData\Local\Temp\xfs-98c1ccf6\yarn.CMD
    npm: 9.5.1 - D:\Program Files\nodejs\npm.CMD
  Languages:
    Python: 3.10.9
  Browsers:
    Edge: Spartan (44.22621.2134.0), Chromium (116.0.1938.54)
  npmPackages:
    gatsby: ^5.12.1 => 5.12.1

Config Flags

Nope

[pieh]

Confirmed. #38489 is looking to fix this.

[pieh]

This should be fixed in [email protected]

[Talaxy009]

@pieh 5.12.3 works well, thanks for your work.