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buffer: make FastBuffer safe to construct #36587

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buffer: make FastBuffer safe to construct #36587

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9 changes: 8 additions & 1 deletion lib/internal/buffer.js
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Expand Up @@ -949,7 +949,14 @@ function writeFloatBackwards(val, offset = 0) {
return offset;
}

class FastBuffer extends Uint8Array {}
class FastBuffer extends Uint8Array {
// Using an explicit constructor here is necessary to avoid relying on
// `Array.prototype[Symbol.iterator]`, which can be mutated by users.
// eslint-disable-next-line no-useless-constructor
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constructor(bufferOrLength, byteOffset, length) {
super(bufferOrLength, byteOffset, length);
}
}

function addBufferPrototypeMethods(proto) {
proto.readBigUInt64LE = readBigUInt64LE;
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