Bug Report

Current Behavior
A clear and concise description of the behavior.

Input Code

• https://babeljs.io/repl/#?babili=false&browsers=&build=&builtIns=false&code_lz=MYGwhgzhAEAqCmEAu0DeAoa0Dm8VMSQAokALASwgC45CBKNTLaAJzwFcWA7aJF9-AG4mAX3QigA&debug=false&forceAllTransforms=false&shippedProposals=true&circleciRepo=&evaluate=true&fileSize=false&lineWrap=false&presets=typescript%2Cenv&prettier=false&targets=Node-8.9&version=7.0.0-beta.42&envVersion=7.0.0-beta.42

class Test {
  get test(this: Test) {
    return true;
  }
}

Expected behavior/code
No errors.

Environment

• Babel version(s): v7.0.0-beta.49

Possible Solution

Additional context/Screenshots
https://www.typescriptlang.org/docs/handbook/functions.html#this