In REPL, if response is created from a blob, then response.arrayBuffer() never resolves

[UlyssesZh]

Version

v20.5.0

Platform

Linux ulysses-legion-r70002021 5.15.0-76-generic #83~20.04.1-Ubuntu SMP Wed Jun 21 20:23:31 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

Subsystem

No response

What steps will reproduce the bug?

Run node in command line to enter REPL mode, then run the following:

response = new Response(new Blob([new Uint8Array([5,2,0])]));
await response.arrayBuffer(); // stuck forever

How often does it reproduce? Is there a required condition?

The code snippet above reproduces the bug steadily. However, similar codes do not produce the same bug when run them in a script file. Also, strangely, the one-liner does not reproduce the same bug (in REPL):

await new Response(new Blob([new Uint8Array([5,2,0])])).arrayBuffer(); // gets expected result

What is the expected behavior? Why is that the expected behavior?

No response

What do you see instead?

Stuck forever.

Additional information

I tried v18 and v20, and I found that the bug is only reproduceable on v20 but not on v18.

Also, there is another bug that I think is related:

// test.mjs
const response = await fetch(URL.createObjectURL(new Blob([new Uint8Array([5,2,0])])));
console.log(await response.arrayBuffer());

node test.mjs

Run this script will crash Node v20 (with exit code 13 and no output). Node v18 runs it fine expectedly.

[KhafraDev]

probably duplicate of #48916

[debadree25]

The code in arrayBuffer() wasnt changed so seems unlikely to be related to #48916 does it fail on all version of v20x? on v18.x i think the blob dataqueue implementation hasn't been backported

Edit: does response use stream() to collect the array buffer by any chance

[UlyssesZh]

does it fail on all version of v20x?

No. I tried v20.3.1, v20.4.0, and v20.5.0, among which v20.3.1 does not have the same bug.

[debadree25]

Indeed #48935 fixes this

[KhafraDev]

Edit: does response use stream() to collect the array buffer by any chance

Yes it does, https://github.com/nodejs/undici/blob/c83b084879fa0bb8e0469d31ec61428ac68160d5/lib/fetch/body.js#L43-L45

[debadree25]

fixed by 3224527