[Pkg-rust-maintainers] Bug#1129190: jujutsu FTBFS: error[E0432]: unresolved import `rand::rngs::OsRng`

[Santiago Vila]

On Mon, Mar 30, 2026 at 11:56:19AM +0300, Adrian Bunk wrote:

> This might have been a toolchain error?
> 
> 25 | use rand::rngs::OsRng;
>    |     ^^^^^^^^^^^^^^^^^ no `OsRng` in `rngs`
> ...

I don't know rust to tell, but it does not look like a toolchain error to me.

Apparently the package is trying to be "compatible with old dependencies"
via 0001-Disable-unneded-deps-support-older-deps-as-needed.patch.

After applying the patch, Cargo.toml says

rand = ">=0.8.5"

so this looks like breaking changes in rand 0.9 to which the package
should adapt. I see that librust-rand-dev in unstable is already at 0.10.0,
so maybe trying to support old dependencies is the root of the problem here.

Thanks.