babel/packages/babel-plugin-transform-parameters/test/fixtures/parameters/rest-spread-optimisation/input.js

// optimisation

function foo(...bar) {
  foo(...bar);
}

// deoptimisation

function foo(a, ...b) {
  foo(...b);
}

function foo(...b) {
  foo(1, ...b);
}

function foo(...args){
  args.pop()
  foo(...args);
}