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31 lines
1.0 KiB
31 lines
1.0 KiB
12 years ago
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/*===
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TypeError
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===*/
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/* This should end up in TypeError; the property is non-configurable accessor,
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* and the inbound descriptor is a data descriptor (because of its writable
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* property). There was a bug causing this to be silently ignored.
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12 years ago
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*
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* The bug happened because the "writable" flag of the current property is
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* "not defined" initially (accessor property) but is treated like "false"
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* internally. This causes the algorithm to determine that since writable
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* is being changed from false to false, and enumerable/configurable are
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* similarly not being changed, there is nothing to check. The attempt to
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* change the property from accessor to data property is thus not caught.
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12 years ago
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*/
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try {
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var obj = Object.create(Object.prototype, {
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foo: { enumerable: true, configurable: false, get: function(){}, set: function() {} }
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});
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Object.defineProperty(obj, 'foo', {
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writable: false, enumerable: true, configurable: false, unknown: 'should ignore'
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});
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print('should not succeed');
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} catch (e) {
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print(e.name);
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}
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