michael@0: // |jit-test| debug
michael@0: function f() {
michael@0:     let (x = 1) {
michael@0:         while (true) {
michael@0:             yield evalInFrame(0, "x");
michael@0:             x++;
michael@0:             let (y = 1) {
michael@0:                 yield evalInFrame(0, "++y");
michael@0:                 yield evalInFrame(0, "++y");
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: var gen = f();
michael@0: assertEq(gen.next(), 1);
michael@0: assertEq(gen.next(), 2);
michael@0: gc();
michael@0: assertEq(gen.next(), 3);
michael@0: gc();
michael@0: assertEq(gen.next(), 2);
michael@0: assertEq(gen.next(), 2);
michael@0: gc();
michael@0: assertEq(gen.next(), 3);
michael@0: gc();
michael@0: assertEq(gen.next(), 3);
michael@0: assertEq(gen.next(), 2);
michael@0: gc();
michael@0: assertEq(gen.next(), 3);
michael@0: gen = null;
michael@0: gc();
michael@0: 
michael@0: function g() {
michael@0:     let (x = 1) {
michael@0:         while (true) {
michael@0:             var inner = function (inc) { x += inc; return evalInFrame(0, "x") };
michael@0:             assertEq(inner(0), x);
michael@0:             yield inner;
michael@0:             assertEq(inner(0), x);
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: var gen = g();
michael@0: var g1 = gen.next();
michael@0: var g2 = gen.next();
michael@0: gc();
michael@0: assertEq(g1(1), 2);
michael@0: assertEq(g2(1), 3);
michael@0: gc();
michael@0: assertEq(g1(1), 4);
michael@0: assertEq(g2(1), 5);
michael@0: gen = g1 = g2 = null;
michael@0: gc();