1.39.0 breaks quinn: linked_list.rs panic

[alexheretic]

Version 1.39.0

Platform
Linux alex-XPS-15-9520 6.5.0-44-generic #44~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jun 18 14:36:16 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

Description
tokio 1.39.0 causes quinn to panic. Repro running quinn tests. See quinn-rs/quinn#1936

thread 'tests::stream_id_flow_control' panicked at /home/alex/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.39.0/src/util/linked_list.rs:123:9:
assertion `left != right` failed
  left: Some(0x7405e001cca8)
 right: Some(0x7405e001cca8)

As suggested by @Darksonn reverting #6584 fixes the issue.

[Darksonn]

Thank you. We will be reverting this change for 1.39.1.

Afterwards, we can try to determine what the bug is and re-land the change for 1.40.0.

[fasterthanlime]

Amazingly, I have spent days debugging this, believing that my terrible, no-good shared object hacks were causing memory corruption.

...but I was running a patched tokio, forked from well after #6584 was merged.

So chances are, I've been chasing a ghost this whole time.

Ah well, at least there's pretty colors now.