The linux-amd64-wsl builder (owned by @mengzhuo) flipped abruptly from almost always passing to almost always failing on December 13, 2022:
On the main branch, it happened first on CL 457055 on Dec 13. But it also started happening on 1.19 and 1.18 release branches on a completely unrelated change (CL 456560 and 456561) on Dec 14. This suggests that the failure is more likely to be caused by something that happened on that week rather than a particular code change.
The most common error is:
fatal error: trace: ReadTrace got invalid frequency
Updates: I've transfered all wsl builder to new esxi based server, but there is no new commit so I think we need to wait for it to close this issue.
2023-1-4: Ian upload a new commit but still failed on wsl. It turns out the firewall of Windows blocked all broadcast pacakge, I've disabled firewall.