/**
 * js add property do not work at emit()
 *
 * @link https://jira.mongodb.org/browse/
 *
 * Affected versions:		r2.1.0-1580-g0c1a6bd (v8)
 * 					v8 engine: Version 3.9.23
 *
 * Not affected versions:	2.0.3-1 (spider monkey)
 */

var testCollName = 'such-collection-can-t-exist';
var testColl = db.getCollection(testCollName);
testColl.insert({key: 1, foo: {bar: 1}});
testColl.insert({key: 1, foo: {bar: 1}});
testColl.insert({key: 1, foo: {bar: 1}});

res = db.runCommand({
	mapreduce: testCollName,
	map: function() {
		this.foo.additional = 1;
		assert(this.foo.additional, "additional not exist");
		emit(this.key, {foo: this.foo});
	},
	reduce: function(k, vals) {
		return 0;
	},
	out: {inline: 1}, // the same with "replace" and others
});
printjson(res);

testColl.drop();