bug2077725.js - mozsearch

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// |jit-test| --enable-arraybuffer-immutable

const handler = {get() { return 71; }};

function read(receiver) { return receiver[0]; }

const warmup = new Proxy({}, handler);

for (let iteration = 0; iteration < 20; iteration++) read(warmup);

const receiver = new Proxy(new Uint8Array(new ArrayBuffer(1).transferToImmutable()), handler);

let threw = false;

try { read(receiver); } catch (error) {

    if (!(error instanceof TypeError)) throw error;

    threw = true;

if (!threw) throw new Error('missing TypeError for immutable element');