Fix object rest enumeration #29676
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Fix object rest enumeration #29676
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When this PR lands, the same change should be made to |
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rbuckton
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Apr 26, 2019
| for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0) | ||
| t[p[i]] = s[p[i]]; | ||
| for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) { | ||
| if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable(p[i])) |
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This is incorrect as you are passing the wrong receiver. Its highly unlikely p[i] is enumerable on Object.prototype. You probably mean this:
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| if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable(p[i])) | |
| if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i])) |
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Ah, makes sense. In that case, does s.propertyIsEnumerable(p[i]) work as well?
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On second thought, I suppose s could have its own implementation of propertyIsEnumerable, so no, that probably does not work.
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As @ajafff mentioned above, you should also open a PR against https://github.com/Microsoft/tslib for the same change: |
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It looks like you still have some failing tests. |
…ent enumerable symbols from sneaking through.
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Yep, sorry. Fixed! |
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'Bug' or 'help wanted' or is in the Community milestone
masterbranchjake runtestslocallyFixes #29616
Adjusts the __rest function in destructuring.ts to check if property is enumerable.