XLSX.read crashes Bun

[emadda]

What version of Bun is running?

0.7.1

What platform is your computer?

Darwin arm64 arm

What steps can reproduce the bug?

I am trying to run this function: https://docs.sheetjs.com/docs/api/parse-options

The input is a Uint8Array. It works with Node.js, but with Bun it never returns from the read function with no output to stdout.

Is there a flag I can use to see the Bun error logs, or a debugger to follow the execution?

const workbook = XLSX.read(utf8ar_xlsx, {type: "array"});

Version: "xlsx": "^0.18.5"

What is the expected behavior?

Function returns

What do you see instead?

No return, process does nothing and stalls.

Additional information

file.xlsx:

a	b
1	1
2	2

[emadda]

example-a.xlsx

This is the file that crashes Bun when passed to XLSX.read

[Hanaasagi]

reproduce code

import fs from "fs";
import XLSX from "xlsx";

fs.readFile("./example-a.xlsx", (err, result) => {
  if (err) throw err;

  const raw = new Uint8Array(result.buffer);

  const workbook = XLSX.read(raw, { type: "array" });
  console.log(workbook);
});

coredump stack

This encoding might be Latin1.

Updated:

Here is the minimal reproduction code without relying on any third-party libraries:

import assert from "assert";

const raw = Buffer.from([0, 104, 0, 101, 0, 108, 0, 108, 0, 111]);
const data = new Uint16Array(raw);

const decoder = new TextDecoder("UTF-16");
const str = decoder.decode(data);
assert.strictEqual(str, "\x00h\x00e\x00l\x00l\x00o");

console.log("panic now");
const buf = Buffer.from(str, "latin1");
console.log("never reach here");
assert.deepStrictEqual(buf, raw);