bun doesn't work correctly with `ky` - a popular fetching library

[blitss]

ky is a popular fetching library based on fetch which has over 10k stars on Github. It doesn't work nice with Bun and sometimes provides undefined instead of json output.

What version of Bun is running?

1.1.12+43f0913c3

What platform is your computer?

Darwin 23.5.0 arm64 arm

What steps can reproduce the bug?

create repro.ts file and run it:

import _ky from 'ky'

const ky = _ky.extend({
  "method": "GET",
})

while (true) {
  const fetched = await ky('https://jsonplaceholder.typicode.com/posts/1').json<any>()
  console.log(fetched.id)
}

What is the expected behavior?

Bun expected to output

1
1
1
1
1
1
1
1

Literally always one

What do you see instead?

It randomly provides undefined values, which doesn't happen with node

$ bun repro.ts
undefined
undefined
undefined
1
undefined
1
1
undefined
undefined
undefined
1
1
1
1
1
undefined
1
undefined
1
1
1
1
1
1

Additional information

No response

[devunt]

Related to #1381, #2477, #6348. Possible fix in #12473 is waiting for landing.

[LucHermkens]

Fixed in Bun v1.1.27