"the types mismatch" warning when using same prop name with different types

[csardinha]

Describe the bug

Storybook (addon-docs) shows a warning in console when defining a prop and defaultProp with the same name but different types in two different components.

To Reproduce
Steps to reproduce the behavior:

1. Create a React Storybook with the addon-docs
2. Create two React components with a prop that has the same name but different types:

MyFirstComponent.propTypes = {
      myProp: PropTypes.number
}

MyFirstComponent.defaultProps = {
      myProp: 0
}

MySecondComponent.propTypes = {
      myProp: PropTypes.array
}

MySecondComponent.defaultProps = {
      myProp: []
}

3. Check the console

Expected behavior
No error should appear in the console

System:

Environment Info:

System:
OS: macOS 10.15.5
CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
Binaries:
Node: 12.16.1 - ~/.nvm/versions/node/v12.16.1/bin/node
Yarn: 1.22.4 - ~/.nvm/versions/node/v12.16.1/bin/yarn
npm: 6.13.4 - ~/.nvm/versions/node/v12.16.1/bin/npm
Browsers:
Chrome: 83.0.4103.106
Safari: 13.1.1
npmPackages:
@storybook/addon-a11y: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/addon-actions: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/addon-docs: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/addon-storyshots: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/addon-storyshots-puppeteer: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/addons: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/react: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/theming: 6.0.0-beta.23 => 6.0.0-beta.23
@storybook/vue: 6.0.0-beta.23 => 6.0.0-beta.23

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[shilman]

Son of a gun!! I just released https://github.com/storybookjs/storybook/releases/tag/v6.0.0-rc.13 containing PR #11624 that references this issue. Upgrade today to try it out!

You can find this prerelease on the @next NPM tag.

Closing this issue. Please re-open if you think there's still more to do.