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const x = 1; function testConst() { for (var i = 0; i < 20; i++) { try { x = 2; } catch (e) { continue; } throw "Fail1"; } assertEq(x, 1); } testConst(); function testUninit() { for (var i = 0; i < 20; i++) { try { y = 2; } catch (e) { continue; } throw "Fail2"; } } testUninit(); let y;