nodejs 25.6 ships with broken undici - "Cannot perform ArrayBuffer.prototype.slice on a detached ArrayBuffer" #61679
Description
Version
v25.6.0
Platform
Linux 9743de132575 6.12.0-55.41.1.el10_0.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Oct 31 14:20:11 UTC 2025 x86_64 GNU/Linux
Subsystem
fetch / undici
What steps will reproduce the bug?
The bug was introduced in undici v7.19.2, which shipped in nodejs 25.6: #61566
undici already released a fixed v7.20.0 - https://github.com/nodejs/undici/releases/tag/v7.20.0 with this fix nodejs/undici#4791
How often does it reproduce? Is there a required condition?
100%
What is the expected behavior? Why is that the expected behavior?
fetch not crashing
What do you see instead?
fetch is crashing as described in the aforementioned issue, and we've ran into similar issues ourselves
Additional information
No response