if (ctx->context_.IsEmpty())

return;

ctx->sandbox()->Set(property, value);

bool is_declared =

ctx->global_proxy()->HasRealNamedProperty(ctx->context(),

property).FromJust();

bool is_contextual_store = ctx->global_proxy() != args.This();

bool set_property_will_throw =

args.ShouldThrowOnError() &&

!is_declared &&

is_contextual_store;

if (!set_property_will_throw) {

ctx->sandbox()->Set(property, value);

}

}

'use strict';

require('../common');

const assert = require('assert');

const vm = require('vm');

const ctx = vm.createContext();

// Test strict mode inside a vm script, i.e., using an undefined variable

// throws a ReferenceError. Also check that variables

// that are not successfully set in the vm, must not be set

// on the sandboxed context.

vm.runInContext('w = 1;', ctx);

assert.strictEqual(1, ctx.w);

assert.throws(function() { vm.runInContext('"use strict"; x = 1;', ctx); },

/ReferenceError: x is not defined/);

assert.strictEqual(undefined, ctx.x);

vm.runInContext('"use strict"; var y = 1;', ctx);

assert.strictEqual(1, ctx.y);

vm.runInContext('"use strict"; this.z = 1;', ctx);

assert.strictEqual(1, ctx.z);

// w has been defined

vm.runInContext('"use strict"; w = 2;', ctx);

assert.strictEqual(2, ctx.w);