log spread element rest parameter as a candidate instead of replacing it in place - fixes #1796

test/core/fixtures/transformation/es6.parameters.rest/spread-optimisation/actual.js

@@ -13,3 +13,8 @@ function foo(a, ...b) {
 function foo(...b) {
   foo(1, ...b);
 }
+
+function foo(...args){
+  args.pop()
+  foo(...args);
+}

test/core/fixtures/transformation/es6.parameters.rest/spread-optimisation/expected.js

@@ -23,3 +23,12 @@ function foo() {
 
   foo.apply(undefined, [1].concat(b));
 }
+
+function foo() {
+  for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
+    args[_key3] = arguments[_key3];
+  }
+
+  args.pop();
+  foo.apply(undefined, args);
+}