Evade override mistake#474
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mcollina merged 1 commit intonodejs:mainfrom Jun 11, 2022
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See https://github.com/Agoric/agoric-sdk/blob/master/patches/bl%2B%2Breadable-stream%2B3.6.0.patch The original code used assignment to override the `name` and `toString` properties inherited from `Error.prototype`. However, if `Error.prototype` is frozen, as it is under Hardened JS (aka SES) or under the Node frozen intrinsics flag, then this assignment fails due to the JavaScript "override mistake". `enumerable: true` would accurately preserve the behavior of the original assignment, but I'm guessing that was not intentional. For an actual error subclass, this property would not be enumerable, so my PR currently proposes that. But either would work, so let me know if you'd like me to change it.
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Could you add a test for this under test/ours? |
benjamingr
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Jun 11, 2022
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Thanks @erights
Would it also make sense to fix this in Node.js core? Is there value in frozen-error in the platform?
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See https://github.com/Agoric/agoric-sdk/blob/master/patches/bl%2B%2Breadable-stream%2B3.6.0.patch
The original code used assignment to override the
nameandtoStringproperties inherited fromError.prototype. However, ifError.prototypeis frozen, as it is under Hardened JS (aka SES) or under the Node frozen intrinsics flag, then this assignment fails due to the JavaScript "override mistake".enumerable: truewould accurately preserve the behavior of the original assignment, but I'm guessing that was not intentional. For an actual error subclass, this property would not be enumerable, so my PR currently proposes that. But either would work, so let me know if you'd like me to change it.