undefined is not a constructor (evaluating 'new zlib.BrotliDecompress')

[gungun974]

What version of Bun is running?

1.0.2+37edd5a6e389265738e89265bcbdf2999cb81a49

What platform is your computer?

Linux 6.4.15-200.fc38.x86_64 x86_64 unknown (Fedora 38)

What steps can reproduce the bug?

Create a file like test.js

Write this :

const zlib = require("zlib");

console.log(new zlib.BrotliDecompress());

What is the expected behavior?

The expected behavior with Node v18.16.0 is that :

<ref *1> BrotliDecompress {
  _writeState: Uint32Array(2) [ 0, 0 ],
  _readableState: ReadableState {
    objectMode: false,
    highWaterMark: 16384,
    buffer: BufferList { head: null, tail: null, length: 0 },
    length: 0,
    pipes: [],
    flowing: null,
    ended: false,
    endEmitted: false,
    reading: false,
    constructed: true,
    sync: false,
    needReadable: false,
    emittedReadable: false,
    readableListening: false,
    resumeScheduled: false,
    errorEmitted: false,
    emitClose: true,
    autoDestroy: true,
    destroyed: false,
    errored: null,
    closed: false,
    closeEmitted: false,
    defaultEncoding: 'utf8',
    awaitDrainWriters: null,
    multiAwaitDrain: false,
    readingMore: false,
    dataEmitted: false,
    decoder: null,
    encoding: null,
    [Symbol(kPaused)]: null
  },
  _events: [Object: null prototype] { prefinish: [Function: prefinish] },
  _eventsCount: 1,
  _maxListeners: undefined,
  _writableState: WritableState {
    objectMode: false,
    highWaterMark: 16384,
    finalCalled: false,
    needDrain: false,
    ending: false,
    ended: false,
    finished: false,
    destroyed: false,
    decodeStrings: true,
    defaultEncoding: 'utf8',
    length: 0,
    writing: false,
    corked: 0,
    sync: true,
    bufferProcessing: false,
    onwrite: [Function: bound onwrite],
    writecb: null,
    writelen: 0,
    afterWriteTickInfo: null,
    buffered: [],
    bufferedIndex: 0,
    allBuffers: true,
    allNoop: true,
    pendingcb: 0,
    constructed: true,
    prefinished: false,
    errorEmitted: false,
    emitClose: true,
    autoDestroy: true,
    errored: null,
    closed: false,
    closeEmitted: false,
    [Symbol(kOnFinished)]: []
  },
  allowHalfOpen: true,
  bytesWritten: 0,
  _handle: BrotliDecoder {
    onerror: [Function: zlibOnError],
    [Symbol(owner_symbol)]: [Circular *1]
  },
  _outBuffer: <Buffer 20 74 df 49 b4 7f 00 00 20 74 df 49 b4 7f 00 00 00 b9 3b 48 b4 7f 00 00 00 b9 3b 48 b4 7f 00 00 88 87 a5 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ... 16334 more bytes>,
  _outOffset: 0,
  _chunkSize: 16384,
  _defaultFlushFlag: 0,
  _finishFlushFlag: 2,
  _defaultFullFlushFlag: 1,
  _info: undefined,
  _maxOutputLength: 4294967296,
  [Symbol(kCapture)]: false,
  [Symbol(kCallback)]: null,
  [Symbol(kError)]: null
}

What do you see instead?

The unexpected behavior with bun v1.0.2 is that :

1 | const zlib = require("zlib");
2 | 
3 | console.log(new zlib.BrotliDecompress());
               ^
TypeError: undefined is not a constructor (evaluating 'new zlib.BrotliDecompress')
      at /home/gungun974/test.js:3:12
      at globalThis (/home/gungun974/test.js:3:39)

Additional information

I was trying to install Sharp with Bun in the Bun official Dockerfile and I see post install was missing.

So my reflex is just to run the install sharp binary script manually and is here I found that Bun didn't support zlib.BrotliDecompress() like node does.

personally I will find an other way for my dockerfile to install sharp binary but but I still had to report this bug.

[nektro]

Added in #10722 and released in Bun 1.1.8 https://bun.sh/blog/bun-v1.1.8#new-brotli-support-for-node-zlib