Forbid 'new super()'

FIX: Disallow `new super()` expressions.

Closes #1431

Author: marijnh

acorn/src/expression.js

@@ -719,6 +719,8 @@ pp.parseNew = function() {
   }
   let startPos = this.start, startLoc = this.startLoc
   node.callee = this.parseSubscripts(this.parseExprAtom(null, false, true), startPos, startLoc, true, false)
+  if (node.callee.type === "Super" && node.callee.start === startPos)
+    this.raiseRecoverable(startPos, "Invalid use of 'super'")
   if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)
   else node.arguments = empty
   return this.finishNode(node, "NewExpression")

test/tests-harmony.js

@@ -16430,6 +16430,7 @@ testFail("class A extends B { constructor() { super } }", "Unexpected token (1:4
 testFail("class A extends B { constructor() { super; } }", "Unexpected token (1:41)", { ecmaVersion: 6 })
 testFail("class A extends B { constructor() { (super)() } }", "Unexpected token (1:42)", { ecmaVersion: 6 })
 testFail("class A extends B { foo() { (super).foo } }", "Unexpected token (1:34)", { ecmaVersion: 6 })
+testFail("class A extends B { constructor() { new super() } }", "Invalid use of 'super' (1:40)", {ecmaVersion: 6})
 test("({super: 1})", {}, { ecmaVersion: 6 })
 test("import {super as a} from 'a'", {}, { ecmaVersion: 6, sourceType: "module" })
 test("function a() {} export {a as super}", {}, { ecmaVersion: 6, sourceType: "module" })