`no-unused-prop-types` doesn't check `nextProps` of `componentWillReceiveProps`

If a prop is only used in the context of nextProps, the lint rule mistakenly thinks that the prop is never used.

Here’s a repro case:

import React, {PropTypes} from "react";

export default React.createClass({

  propTypes: {
    foo: PropTypes.bool, // this line gets flagged when it shouldn't
    bar: PropTypes.func,
  },

  componentWillReceiveProps (nextProps) {
    if (nextProps.foo) {
      return;
    }
  },

  render () {
    this.props.bar;
    return <div />;
  }
});

[mjilugu]

Hi, I still get this same error. When we use a prop only with nextProps to set the state in the componentWillRecieveProps(nextProps) method and not elsewhere we get react/no-used-prop-types error for the prop in the propTypes block.

[wx2228]

@jseminck thanks for the prompt reply. I am using 6.10.3. I will upgrade it