TypeError: Cannot read property 'valueTracker' of undefined

[sangle7]

Do you want to request a feature or report a bug?
A bug

What is the current behavior?
when i worked with the branch 15.6-dev, this error happened

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem. Your bug will get fixed much faster if we can run your code and it doesn't have dependencies other than React. Paste the link to your JSFiddle (https://jsfiddle.net/Luktwrdm/) or CodeSandbox (https://codesandbox.io/s/new) example below:

const App = props => (
  <form onChange={event => console.log(event.target.value)}>
    <label>
      <input type={'radio'} name={'myGroup'} value={1}/>
      Value 1
    </label>
    <label>
      <input type={'radio'} name={'myGroup'} value={2}/>
      Value 2
    </label>
    <label>
      <input type={'radio'} name={'myGroup'} value={3}/>
      Value 3
    </label>
  </form>
)

the error shows each time when a radio be clicked on

What is the expected behavior?
I had opened a pr about it #12230

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?
on branch 15.6-dev
notice that this error has been fixed in v16

[aweary]

@sangle7 why are you running the 15.6-dev branch? I don't think that branch is in a stable state. It sounds like you're running mismatched versions of react and react-dom.

[sangle7]

@aweary hi, for some reasons, our project is not ready for v16, and the stable 15.6 version has a bug like this #10739. I noticed that the 15.6-dev branch has fixed this bug, so i ran project with it. I build from this branch and use npm link to link my project with react and react-dom, and the problem is still there.

[aweary]

@sangle7 I would double check that npm link was sufficient, sometimes symlinks don't work as expected. You can try setting breakpoints and seeing if it's running the correct code. On that branch _wrapperState is defined here: https://github.com/facebook/react/blob/15.6-dev/src/renderers/dom/client/wrappers/ReactDOMInput.js#L149-L157.