js/src/jit-test/tests/ion/bug779631.js


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var flag = 0;
var a = {};
Object.defineProperty(a, "value", {set: function(x) {}});
a.watch("value", function(){flag++;});

for(var i = 0; i < 100; i++) {
    a.value = i;
    assertEq(flag, i+1);
}