transform-object-rest-spread@6.19.0 duplicates function calls

[erikdesjardins]

Input Code

const { x, ...y } = foo();

Babel Configuration (.babelrc, package.json, cli command)

{
  "dependencies": {
    "babel-plugin-transform-object-rest-spread": "^6.19.0",
    "babel-cli": "^6.18.0"
  },
  "scripts": {
    "build": "babel --plugins transform-object-rest-spread src.js > out.js"
  }
}

Expected Behavior

const _ref = foo();
const { x } = _ref;
const y = _objectWithoutProperties(_ref, ["x"]);

Current Behavior

const { x } = foo();
const y = _objectWithoutProperties(foo(), ["x"]);

Context

Your Environment

software	version
Babel	babel-core@6.18.2, babel-cli@6.18.0, babel-plugin-transform-object-rest-spread@6.19.0
node	4.1.2, 6.5.0, 7.1.0
npm	2.14.4, 3.10.3, 3.10.9
Operating System	Windows, Linux

It also does something crazy for this code 😜 ... c gets hoisted out of the arrow function and then the above bug duplicates the entire thing:

in:

const { a } = foo(({ b, ...c }) => {
  console.log(b, c);
});

out:

const { a } = foo(({ b }) => {
  console.log(b, c);
});
const c = _objectWithoutProperties(foo(({ b }) => {
  console.log(b, c);
}), ["b"]);