function build_getter(i) { var x = [i]; return function f() { return x; } } function test() { var N = internalConst("INCREMENTAL_MARK_STACK_BASE_CAPACITY") + 2; var o = {}; var descriptor = { enumerable: true}; for (var i = 0; i != N; ++i) { descriptor.get = build_getter(i); Object.defineProperty(o, i, descriptor); } // At this point we have an object o with N getters. Each getter in turn // is a closure storing an array. During the GC we push to the object // marking stack all the getters found in an object after we mark it. As N // exceeds the size of the object marking stack, this requires to run the // dealyed scanning for some closures to mark the array objects stored in // them. // // We run the GC twice to make sure that the background finalization // finishes before we access the objects. gc(); gc(); for (var i = 0; i != N; ++i) assertEq(o[i][0], i); } test();