boolean-prop-naming triggers "Cannot read property 'properties' of undefined"

[roubaobaozi]

Hi,

I think this is similar to: #1369

I’m running 7.4.0 and still getting this error:

package.json:
"eslint-plugin-react": "^7.4.0"

eslint is 4.7.2

.eslintrc.js:

"react/boolean-prop-naming": [
    "error",
    { "rule": "^(is|has)[A-Z]([A-Za-z0-9]?)+" }
],

Error:

Cannot read property 'properties' of undefined
TypeError: Cannot read property 'properties' of undefined
    at EventEmitter.MemberExpression (/Users/user/repos/myrepo/node_modules/eslint-plugin-react/lib/rules/boolean-prop-naming.js:183:45)
    at emitOne (events.js:120:20)
    at EventEmitter.emit (events.js:210:7)
    at NodeEventGenerator.applySelector (/Users/user/repos/myrepo/node_modules/eslint/lib/util/node-event-generator.js:265:26)
    at NodeEventGenerator.applySelectors (/Users/user/repos/myrepo/node_modules/eslint/lib/util/node-event-generator.js:294:22)
    at NodeEventGenerator.enterNode (/Users/user/repos/myrepo/node_modules/eslint/lib/util/node-event-generator.js:308:14)
    at CodePathAnalyzer.enterNode (/Users/user/repos/myrepo/node_modules/eslint/lib/code-path-analysis/code-path-analyzer.js:606:23)
    at Traverser.enter (/Users/user/repos/myrepo/node_modules/eslint/lib/linter.js:962:32)
    at Traverser.__execute (/Users/user/repos/myrepo/node_modules/estraverse/estraverse.js:397:31)
    at Traverser.traverse (/Users/user/repos/myrepo/node_modules/estraverse/estraverse.js:501:28)

The issue is stemming from this code:

Card.propTypes = merge({}, Card.propTypes, {
    showScore: propTypes.bool
});