error 'chunk ArrayBuffer is zero-length or detached' since miniflare 2.8.X

[cdloh]

I've recently been updating my dependences going from miniflare 2.3.0 to 2.8.2 and I've started to get a bunch of errors from requests

    TypeError: Invalid state: chunk ArrayBuffer is zero-length or detached

      at Object.pull (node_modules/@miniflare/core/src/standards/streams.ts:141:22)

I'm not entirely sure how to track this down as the unit tests work fine in 2.7.X but breaks in any of the 2.8 versions.

I'm running it in the jest environment versioned the same as the miniflare environment.

I imagine it's something to do with the changes required for #168 but as far as I can tell I'm not using any features that weren't available.

[cdloh]

I've tracked it down to this if block in streams.ts

https://github.com/cloudflare/miniflare/blob/master/packages/core/src/standards/streams.ts#L130-L142

The reader can sometimes get back a 0 ArrayBuffer

console.log(done)
VM1294:1 false
undefined
console.log(value)
VM1349:1 Uint8Array [buffer: ArrayBuffer(0), byteLength: 0, byteOffset: 0, length: 0]buffer: ArrayBuffer(0)  byteLength: 0byteOffset: 0length: 0Symbol(Symbol.toStringTag): (...)[[Prototype]]: TypedArray
undefined

[mrbbot]

Hey! 👋 Thanks for reporting and identifying the cause of this issue. 🙂 Should be fixed in the next release. 👍

[cdloh]

@mrbbot great to hear! Do you have a particular release cadence?

[mrbbot]

Hey! 👋 Miniflare 2.9.0 has just been released, which implements a fix. You can find the full changelog here.