bug#41596: [staging] 'librsvg-next' build failure

[Efraim Flashner]

On Fri, May 29, 2020 at 03:37:36PM +0200, Jakub Kądziołka wrote:
> On Fri, May 29, 2020 at 03:17:51PM +0200, Marius Bakke wrote:
> > On the 'staging' branch, "librsvg-next" (a dependency of GNOME) fails to
> > compile the 'xml-rs' Rust crate:
> > 
> > --8<---------------cut here---------------start------------->8---
> >    Compiling xml-rs v0.8.1
> > error[E0658]: `cfg(doctest)` is experimental and subject to change
> >  --> 
> > /tmp/guix-build-librsvg-2.46.4.drv-0/librsvg-2.46.4/vendor/rust-xml-rs-0.8.1.tar.gz/src/lib.rs:9:7
> >   |
> > 9 | #[cfg(doctest)]
> >   |       ^^^^^^^
> >   |
> >   = note: for more information, see 
> > https://github.com/rust-lang/rust/issues/62210
> 
> That's a feature that was stabilized in Rust 1.40. I have a WIP patch
> that updates Rust upto 1.43.1, but it's blocked on a LLVM 9 patch backport I
> haven't had time to prepare yet. I won't have the time to look into it
> properly right now, but here are the relevant links:
> 
> https://github.com/rust-lang/llvm-project/commit/7d5e7c023053660ffe494d72ce471e48ecc7f49b
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959877
> https://github.com/rust-lang/llvm-project/pull/43
> 
> Regards,
> Jakub Kądziołka

In any case, I worked around the issue by changing the doctest
declarations into test declarations. I also bumped rust-xml-rs-0.8 to
0.8.3.


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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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