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function f() { var n; var k; for (var i = 0; i < 2*RUNLOOP; ++i) { n = undefined; k = n++; if (k) { } } return [k, n]; } var [a, b] = f(); assertEq(isNaN(a), true); assertEq(isNaN(b), true); checkStats({ recorderStarted: 1, recorderAborted: 0, traceCompleted: 1, traceTriggered: 1 });