[Pkg-rust-maintainers] Bug#826938: cargo: FTBFS in testing

[Santiago Vila]

Package: src:cargo
Version: 0.9.0-1
Severity: serious

Dear maintainer: This package currently fails to build from source in
stretch:

-----------------------------------------------------------
cargo:curl: /<<PKGBUILDDIR>>/deps/curl-0.2.16/src/ffi/easy.rs:68:65: 68:77 error: can't pass `extern "C" fn(*mut u8, usize, usize, *mut http::body::Body<'_>) -> usize {ffi::easy::curl_read_fn}` to variadic function, cast to `extern "C" fn(*mut u8, usize, usize, *mut http::body::Body<'_>) -> usize`
cargo:curl: /<<PKGBUILDDIR>>/deps/curl-0.2.16/src/ffi/easy.rs:68             ffi::curl_easy_setopt(self.curl, opt::READFUNCTION, curl_read_fn);
cargo:curl:                                                                                                                                     ^~~~~~~~~~~~
-----------------------------------------------------------

You can find a complete build log in the reproducible builds site if
you are interested:

https://reproducible.debian.net/debian/rb-pkg/unstable/amd64/cargo.html

but it FTBFS for me as well in my own autobuilder, so I believe it
should be easy to reproduce.

Thanks.