test failed in CI: check-features

[andrewjstone]

I thought we had an existing issue for this, but couldn't find it.

This test failed on a CI run on PR #8801:

Log showing the specific test failure:

Link here to the specific line of output from the buildomat log showing the failure:

https://buildomat.eng.oxide.computer/wg/0/details/01K3PXTS42J6B66MR0506226T8/t5u4SxwWQpdILGRW4594xc11JBWiNnqhlXNoNEW58UNpo91f/01K3PXWGXHR3HQAN76NX51D099#S50

Excerpt from the log showing the failure:

47 | 2025-08-27T23:37:53.110Z | info: downloading component 'rust-std'
-- | -- | --
48 | 2025-08-27T23:37:55.163Z | info: downloading component 'rustc'
49 | 2025-08-27T23:37:56.474Z |  
50 | 2025-08-27T23:37:56.478Z | thread 'main' panicked at /cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.44.2/src/runtime/io/driver.rs:208:27:
51 | 2025-08-27T23:37:56.478Z | failed to wake I/O driver: Os { code: 0, kind: Uncategorized, message: "Error 0" }
52 | 2025-08-27T23:37:56.478Z | note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
53 | 2025-08-27T23:37:56.494Z | process exited: duration 7970 ms, exit code 1

[bnaecker]

I think that's tracked by oxidecomputer/helios#192

[sunshowers]

Yeah, definitely tracked by that issue.