| 30 Jun 2026 |
 emily | can we get Linux to fake CPUID? 🤪 | 17:43:05 |
 Lach | It won't help since it breaks at compile time | 17:43:24 |
| Lach | llvm 21 doesn't understand the code that rustc 1.96 emits | 17:43:38 |
| Lach | It needs this patch https://github.com/rust-lang/llvm-project/commit/94e2c19f86a699d7a19ff0f4130b696699189c8d | 17:43:55 |
| emily | oh, it's just a build failure? | 17:44:15 |
| Lach | Yes | 17:44:23 |
| emily | that's totally fine then. we can probably fix it for packages that break | 17:44:26 |
 K900 | Two rustcs? | 17:44:35 |
| K900 | That's going to suuuuuuuck | 17:44:40 |
| K900 | And there's the 1.96.1 miscompilation | 17:44:47 |
| Lach | I don't think so, as with ndarray and other packages this issue would be deep into the dependency graph | 17:44:48 |
| emily | I guess if it's everything using zlib-rs, yeah… | 17:44:50 |
| K900 | Which is much more subtle | 17:44:49 |
| emily | the other thing is, 1.96.1 also has https://github.com/libssh2/libssh2/commit/97acf3dfda80c91c3a8c9f2372546301d4a1a7a8 | 17:44:57 |
| emily | I believe we devendor libssh2, but this commit isn't in any release of libssh2 | 17:45:06 |
| K900 | We're not using vendored libssh | 17:45:07 |
| emily | yes but | 17:45:11 |
| emily | that just means we're vulnerable across the board | 17:45:16 |
| emily | so we should probably consider applying this to our libssh2, at which point we eat a Rust rebuild anyway | 17:45:24 |
| K900 | Have we not patched libssh this cycle | 17:45:27 |
| emily | I didn't check admittedly | 17:45:37 |
 whispers [& it/fae] | only one of them | 17:45:39 |
| whispers [& it/fae] | we need a few more iirc. was planning to look once i get off work unless someone does it first | 17:46:04 |
| emily | let's just patch libssh2 and bump Rust. we're already way ahead of schedule | 17:46:15 |
| emily | not worth the grief | 17:46:25 |
| Lach | Also, the other way is updating rustc to use llvm22 packages, I'm not sure if there is any implications in that | 17:46:35 |
| whispers [& it/fae] | looks like someone also proposed libssh2 bumping to an unstable commit a few hours ago: https://github.com/NixOS/nixpkgs/pull/537075 | 17:47:10 |
| emily | let's not, we're due to bump to 22 across the board anyway | 17:47:20 |
| emily | but it can wait another cycle | 17:47:24 |
| Lach | I mean, unless we update, packages using ndarray and zlib-rs are broken... | 17:48:00 |
