boolean-prop-naming rule crashes when prop types is calculated

[lukeapage]

TypeError: Cannot read property 'forEach' of undefined
  at validatePropNaming (c:\project\node_modules\eslint-plugin-react\lib\rules\boolean-prop-naming.js:121:16)
  at Linter.MemberExpression (c:\project\node_modules\eslint-plugin-react\lib\rules\boolean-prop-naming.js:186:9)
  at emitOne (events.js:101:20)
  at Linter.emit (events.js:188:7)
  at NodeEventGenerator.applySelector (c:\project\node_modules\eslint\lib\util\node-event-generator.js:265:26)
  at NodeEventGenerator.applySelectors (c:\project\node_modules\eslint\lib\util\node-event-generator.js:294:22)
  at NodeEventGenerator.enterNode (c:\project\node_modules\eslint\lib\util\node-event-generator.js:308:14)
  at CodePathAnalyzer.enterNode (c:\project\node_modules\eslint\lib\code-path-analysis\code-path-analyzer.js:602:23)
  at Traverser.enter (c:\project\node_modules\eslint\lib\linter.js:925:36)
  at Traverser.__execute (c:\project\node_modules\estraverse\estraverse.js:397:31)
  at Traverser.traverse (c:\project\node_modules\estraverse\estraverse.js:501:28)
  at Traverser.traverse (c:\project\node_modules\eslint\lib\util\traverser.js:31:22)
  at Linter.verify (c:\project\node_modules\eslint\lib\linter.js:922:28)
  at Linter.verifyAndFix (c:\project\node_modules\eslint\lib\linter.js:1228:29)
  at processText (c:\project\node_modules\eslint\lib\cli-engine.js:196:34)
  at processFile (c:\project\node_modules\eslint\lib\cli-engine.js:245:18)
  at executeOnFile (c:\project\node_modules\eslint\lib\cli-engine.js:585:25)
  at fileList.forEach.fileInfo (c:\project\node_modules\eslint\lib\cli-engine.js:622:13)
  at Array.forEach (native)
  at CLIEngine.executeOnFiles (c:\project\node_modules\eslint\lib\cli-engine.js:621:18)
  at Object.<anonymous> (c:\project\node_modules\grunt-eslint\tasks\eslint.js:29:20)
  at Object.<anonymous> (c:\project\node_modules\grunt\lib\grunt\task.js:255:15)
  at Object.thisTask.fn (c:\project\node_modules\grunt\lib\grunt\task.js:73:16)
  at Object.<anonymous> (c:\project\node_modules\grunt\lib\util\task.js:294:30)
  at Task.runTaskFn (c:\project\node_modules\grunt\lib\util\task.js:244:24)
  at Task.<anonymous> (c:\project\node_modules\grunt\lib\util\task.js:293:12)
  at Task.start (c:\project\node_modules\grunt\lib\util\task.js:302:5)
  at Object.grunt.tasks (c:\project\node_modules\grunt\lib\grunt.js:155:8)
  at Object.module.exports [as cli] (c:\project\node_modules\grunt\lib\grunt\cli.js:27:9)
  at Object.<anonymous> (C:\npmprefix\node_modules\grunt-cli\bin\grunt:44:20)
  at Module._compile (module.js:570:32)
  at Object.Module._extensions..js (module.js:579:10)
  at Module.load (module.js:487:32)
  at tryModuleLoad (module.js:446:12)
  at Function.Module._load (module.js:438:3)
  at Module.runMain (module.js:604:10)
  at run (bootstrap_node.js:394:7)
  at startup (bootstrap_node.js:149:9)
  at bootstrap_node.js:509:3

[lukeapage]

repro code:

import _ from 'lodash';
import PropTypes from 'prop-types';
import React from 'react';

class A extends React.Component {
    render() {
        return false;
    }
}

A.propTypes = _.defaults({}, {}, {
    a: PropTypes.object.isRequired,
});

export default A;