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function h() {} class Base {} class C extends Base { constructor(cond) { if (cond) { // Never entered. for (var i = 0; i < args.length; ++i) h(); } super(); } } function f() { for (var i = 0; i < 10; i++) { var x = new C(false); } } for (var i = 0; i < 3; i++) { f(); }