Parsing error on `new` operator without parentheses

[daluege]

Whenever a TypeScript contains a new operator without parentheses, the following error is thrown by eslint:

Parsing error: Cannot read property 'map' of undefined

According to the TypeScript spec, however, this syntax is valid.

Context:

eslint@3.3.1
typescript-eslint-parser@0.1.2

.eslintrc.yml:

extends: eslint:recommended
parser: typescript-eslint-parser

test.ts:

function X () { }
new X;

[nzakas]

What version of TypeScript are you using?

Can you paste in the complete output that you're seeing?

[JamesHenry]

@nzakas I can reproduce this.

It turns out TypeScript just leaves off the arguments property from its NewExpression node when you don't provide the parens. We are trying to map over them without checking if the property exists.

Fix coming up!

With Parens:

Without Parens:

[JamesHenry]

PR here #62

[nzakas]

Awesome work, thanks.