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let a = []; a.length = 30; function check(f) { try { f(); } catch (e) { assertEq(e.message, "too much recursion"); } } let f = function() { return f(...a) + 1; }; let g = () => g(...a) + 1; let h = function() { return new h(...a) + 1; }; check(f); check(g); check(h);