Bun `fetch()` throws `FailedToOpenSocket` when using proxy or unix options

[kevgeoleo]

What version of Bun is running?

1.3.1+89fa0f343

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What steps can reproduce the bug?

Hi,

I would like to report a behavior I observed when running the following code snippet:

//snippet1
fetch("https://www.example.com", {
    proxy: "http://something",    
});

//snippet2
fetch("https://www.example.com", {
    unix: "test.sock",    
});

What is the expected behavior?

Run without error as in Node and Deno.

What do you see instead?

Bun gives the following error for snippet 1:

PS D:\HIWI\RESULTS\17_10_2025> bun run .\17203_toreport.ts
error: Unable to connect. Is the computer able to access the url?
  path: "https://www.example.com/",
 errno: 0,
  code: "ConnectionRefused"


Bun v1.3.1 (Windows x64)

Bun gives the following error for snippet 2:

PS D:\HIWI\RESULTS\17_10_2025> bun run .\17203_toreport.ts
error: Was there a typo in the url or port?
  path: "https://www.example.com/",
 errno: 0,
  code: "FailedToOpenSocket"


Bun v1.3.1 (Windows x64)

Additional information

No response

[github-actions]

Found 1 possible duplicate issue:

1. [BUN API] Unable to use fetch with UNIX Socket #13393

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[github-actions]

This issue has been automatically closed as a duplicate of #13393.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code