var createDOMJITGetterComplexObject = $vm.createDOMJITGetterComplexObject; function shouldThrow(func, errorMessage) { var errorThrown = false; var error = null; try { func(); } catch (e) { errorThrown = true; error = e; } if (!errorThrown) throw new Error('not thrown'); if (String(error) !== errorMessage) throw new Error(`bad error: ${String(error)}`); } var complex = createDOMJITGetterComplexObject(); var object = {}; object.__proto__ = complex; function access(object) { return object.customGetter; } noInline(access); for (var i = 0; i < 1e4; ++i) { shouldThrow(() => { access(object); }, `TypeError: The DOMJITGetterComplex.customGetter getter can only be used on instances of DOMJITGetterComplex`); }