Slot component causes a warning in React 19 about accessing .ref directly

[OriginalEXE]

Bug report

Current Behavior

The Slot component accesses .ref on the element, which seems to be a no-no in React 19. The problematic line seems to be this one:
https://github.com/radix-ui/primitives/blob/main/packages/react/slot/src/Slot.tsx#L66

This results in the following warning:

Warning: Accessing element.ref was removed in React 19. ref is now a regular prop. It will be removed from the JSX Element type in a future release.

Expected behavior

No warnings

Reproducible example

CodeSandbox Template

Suggested solution

I haven't tried it, but maybe something like

ref: forwardedRef ? composeRefs(forwardedRef, (children as any).props.ref ?? (children as any).ref) : (children as any).props.ref ?? (children as any).ref,

Your environment

Software	Name(s)	Version
Radix Package(s)	Any using Slot	latest
React	n/a	19.0.0-beta-6946ebe620-20240508

[bzmillerboy]

A PR is open to address this. #2811

[OriginalEXE]

Ah, didn't find it via search, thanks, eagerly watching that PR then 👀

[fokkerone]

Got the same issue in a
React 18.3.1 ??!!!
NextJs 15.0.3.
App ..

Console Error

Accessing element.ref was removed in React 19. ref is now a regular prop. It will be removed from the JSX Element type in a future release.

Call Stack
Next.js
SlotClone
node_modules/@volta/select/node_modules/@radix-ui/react-slot/dist/index.mjs (40:47)
Next.js
react-stack-bottom-frame
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
renderWithHooks
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
updateForwardRef
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
beginWork
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
runWithFiberInDEV
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
performUnitOfWork
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
workLoopConcurrent
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
renderRootConcurrent
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
performWorkOnRoot
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
performWorkOnRootViaSchedulerTask
./node_modules/next/dist/compiled/react-dom/cjs/react-dom-client.development.js
MessagePort.performWorkUntilDeadline
./node_modules/next/dist/compiled/scheduler/cjs/scheduler.development.js