Verify that symbols are not callable (#2180)

test/built-ins/Symbol/not-callable.js

@@ -0,0 +1,34 @@
+// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-properties-of-symbol-instances
+description: >
+  Symbol primitives and objects are not callable.
+info: |
+  Properties of Symbol Instances
+
+  Symbol instances are ordinary objects that inherit properties from the
+  Symbol prototype object. Symbol instances have a [[SymbolData]] internal slot.
+  The [[SymbolData]] internal slot is the Symbol value represented by this
+  Symbol object.
+features: [Symbol]
+---*/
+
+var sym = Symbol('desc');
+var symObj = Object(Symbol());
+
+assert.throws(TypeError, function() {
+  sym();
+});
+
+assert.throws(TypeError, function() {
+  new sym();
+});
+
+assert.throws(TypeError, function() {
+  symObj();
+});
+
+assert.throws(TypeError, function() {
+  new symObj();
+});