Invalid propType definition crashes linter

[LeZuse]

Using babel-eslint parser, this piece of invalid code (notice the colon instead of an equals sign):
static propTypes: { showCompletedReleases: PropTypes.bool.isRequired }
will crash the linter with this error:

[...]/node_modules/eslint-plugin-react/lib/rules/prop-types.js:165
    switch (propTypes.type) {
                     ^
TypeError: Cannot read property 'type' of null
    at markPropTypesAsDeclared (/Users/zuse/Projects/pb-frontend/node_modules/eslint-plugin-react/lib/rules/prop-types.js:165:22)
    at EventEmitter.ClassProperty (/Users/zuse/Projects/pb-frontend/node_modules/eslint-plugin-react/lib/rules/prop-types.js:220:7)
    at EventEmitter.emit (events.js:107:17)
    at Controller.controller.traverse.enter (/Users/zuse/Projects/pb-frontend/node_modules/eslint/lib/eslint.js:725:25)
    at Controller.__execute (/Users/zuse/Projects/pb-frontend/node_modules/eslint/node_modules/estraverse/estraverse.js:393:31)
    at Controller.traverse (/Users/zuse/Projects/pb-frontend/node_modules/eslint/node_modules/estraverse/estraverse.js:491:28)
    at EventEmitter.module.exports.api.verify (/Users/zuse/Projects/pb-frontend/node_modules/eslint/lib/eslint.js:718:24)
    at processFile (/Users/zuse/Projects/pb-frontend/node_modules/eslint/lib/cli-engine.js:197:27)
    at /Users/zuse/Projects/pb-frontend/node_modules/eslint/lib/cli-engine.js:332:26
    at /Users/zuse/Projects/pb-frontend/node_modules/eslint/lib/util/traverse.js:61:17

[BerkeleyTrue]

This may crash due to babel itself. Tried to see if babel would parse it. Seems like the REPL just hangs until corrected.

https://babeljs.io/repl

[yannickcr]

Babel seems to accept the code but do not output the propTypes key in the compiled source, resulting in missing propTypes definition.

I've updated the rule to ignore the propTypes definition in this case, so you'll get an "propTypes missing" error if your propTypes definition is invalid.