Closed
Description
- Version: problem exists in 0.12.9 and later, does not exist in 0.10.36
- Platform: Darwin XXXX 14.3.0 Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64
- Subsystem: vm
The following script creates a VM context and runs a script that adds a property to that context, redefines that property as immutable, attempts to assign to that property, logs the error if there is one, then logs the value and property descriptor.
Expected behavior (exhibited in Node.js v0.10.36):
Cannot assign to read only property 'x' of #<Object>
20
{ value: 20,
writable: false,
enumerable: false,
configurable: false }
Actual behavior (exhibited in Node.js v4.3.1, v5.8.0):
Cannot assign to read only property 'x' of #<Object>
30
{ value: 30,
writable: true,
enumerable: true,
configurable: true }
var vm = require('vm');
var script = '(' + function () {
'use strict';
global.x = 10;
Object.defineProperty(global, 'x', {
writable: false,
enumerable: false,
configurable: false,
value: 20
});
try {
x = 30;
} catch (e) {
console.error(e);
}
console.log(x); // should be 20
console.log(Object.getOwnPropertyDescriptor(global, 'x'));
} + ')()';
var global = {};
global.console = console;
global.global = global;
var context = vm.createContext(global);
vm.runInContext(script, context);
cc @erights