Bug#1086028: loupe: FTBFS on mips64el: failed to acquire jobserver token: Bad address (os error 14)

Source: loupe
Version: 47.1-2
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)
X-Debbugs-Cc: [email protected], [email protected]
User: [email protected]
Usertags: mips64el

loupe 47.1-2 failed to build on mips64el, with this error during `cargo test`:

https://buildd.debian.org/status/fetch.php?pkg=loupe&arch=mips64el&ver=47.1-2&stamp=1729808238&raw=0
>    Compiling loupe v47.1.0 (/<<PKGBUILDDIR>>)
>      Running `CARGO=/usr/share/cargo/bin/cargo […] rustc --crate-name loupe --edition=2021 src/lib.rs […]`
>      Running `CARGO=/usr/share/cargo/bin/cargo […] rustc --crate-name loupe --edition=2021 src/main.rs […]`
> error: failed to acquire jobserver token
> 
> Caused by:
>   Bad address (os error 14)

To me this looks more like a toolchain issue than something that is wrong
with this specific package, but I don't know the Rust toolchain well enough
to guess which package might have a bug.

I've retried the build: if it succeeds, we can downgrade the severity of
this bug and tag it as unreproducible.

    smcv