**Do you want to request a *feature* or report a *bug*?**
Report a bug

**What is the current behavior?**
The `useState` hook's value is shown as `undefined` in React DevTools if the value is a string or a number. Clicking on the bug icon prints the correct values to console.

![image](https://user-images.githubusercontent.com/21111572/65421153-b7225d80-de0b-11e9-8a69-a31836a41c7c.png)


**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.**
CodeSandbox: https://codesandbox.io/s/keen-colden-syb7r
Direct link to page so you can see the DevTools: https://2km9v.csb.app/

**What is the expected behavior?**
The DevTools should show the correct value of the hook.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
React 16.9.0.
Google Chrome [Version 77.0.3865.90 (Official Build) (64-bit)] running on Linux x64.

This issue appeared after version 4.1.0 (9/19/2019) of the DevTools Chrome extension.

Might be same bug as #16843 but this one appears without any complicated reproduction steps.

const {
    editableValue,
    hasPendingChanges,
    isValid,
    parsedValue,
    reset,
    update,
  } = useEditableValue(initialValue);
  const handleChange = useCallback(({target}) => update(target.value), [
    update,
  ]);
  const handleKeyDown = useCallback(
    event => {
      
      event.stopPropagation();
      switch (event.key) {
        case 'Enter':
          if (isValid && hasPendingChanges) {
            overrideValueFn(path, parsedValue);
          }
          break;
        case 'Escape':
          reset();
          break;
        default:
          break;
      }
    },
    [hasPendingChanges, isValid, overrideValueFn, parsedValue, reset],
  );