Node parity: process.stdin.ref is undefined

[ctjlewis]

What version of Bun is running?

1.2.0-canary.15+8f821b791

What platform is your computer?

Darwin 24.2.0 arm64 arm

What steps can reproduce the bug?

$ bun repl

> process.stdin.ref
undefined

$ node

> process.stdin.ref
[Function (anonymous)]

What is the expected behavior?

process.stdin.ref() is meant to provide a reference to this stream.

$ node
> process.stdin === process.stdin.ref()
true

It's used in libraries like ink, which used to work for Bun but now breaks on latest (release and canary).

What do you see instead?

process.stdin.ref is undefined.

Related

• process.stdin.ref() is throwing an error on Bun 1.2 only #16678
• Compatibility issue with Bun 1.2 vadimdemedes/ink#696

[ctjlewis]

Thank you @pfgithub and @RiskyMH for triage, good labels, sorry I forgot those.

[RiskyMH]

Interesting, in 1.1.45 it was a function (compared to undefined now) but the check evaluated to false

Edit: process.stdin.ref() on 1.1.45 simply returns undefined, but at least its a function

[ctjlewis]

Interesting, in 1.1.45 it was a function (compared to undefined now) but the check evaluated to false

I think I felt the effects of that before without knowing what was going on. We had to manually resume the stream at the top of the program with process.stdin.resume(), that and other things might have been related.

[ctjlewis]

Based, awesome job @Jarred-Sumner.