Compile broken on ubuntu 25.10

[eskech]

Looks like the compile is broken on ubuntu 25.10

Compiling candle-core v0.9.2-alpha.2 (https://github.com/huggingface/candle?rev=0.9.2-alpha.2#8839457c)
error[E0658]: use of unstable library feature unsigned_is_multiple_of
--> /home/XXXXXX/.cargo/git/checkouts/candle-5b4d092929d18d36/8839457/candle-core/src/quantized/gguf_file.rs:66:26
|
66 | if !tensor_elems.is_multiple_of(block_size) {
| ^^^^^^^^^^^^^^
|
= note: see issue #128101 rust-lang/rust#128101 for more information

This is run with rust toolchain stable version 1.85.1.
rustc --version
rustc 1.85.1 (4eb161250 2025-03-15) (built from a source tarball)
https://documentation.ubuntu.com/ubuntu-for-developers/reference/availability/rust/

[eskech]

Also it looks like a lot of dependencies needs at least rust 1.86...
What is the minimum required toochain to build this as it also fails if you are using python 3.13.x?

[jacobgorm]

That looks a bit weird, the current Cargo.toml references:

candle-core = { git = "https://github.com/huggingface/candle", rev="5bd5618" }

Which is newer than 0.10.1 and thereby als newer than 0.9.2-alpha. Which version of witchcraft are you on?

[jacobgorm]

Workaround might to use rustup instead of Ubuntu to manage your rust toolchain