[Pkg-rust-maintainers] Bug#971099: rust-sequoia-openpgp: FTBFS: unsatisfiable build-dependencies: librust-dyn-clone-1+default-dev but it is not installable

[Lucas Nussbaum]

Source: rust-sequoia-openpgp
Version: 0.18.0-1
Severity: serious
Justification: FTBFS on amd64
Tags: bullseye sid ftbfs
Usertags: ftbfs-20200926 ftbfs-bullseye

Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.

Relevant part (hopefully):
> +------------------------------------------------------------------------------+
> | Install package build dependencies                                           |
> +------------------------------------------------------------------------------+
> 
> 
> Setup apt archive
> -----------------
> 
> Merged Build-Depends: debhelper (>= 11), dh-cargo (>= 18), cargo, rustc, libstd-rust-dev, librust-anyhow-1+default-dev, librust-backtrace-0.3+default-dev, librust-base64-0.12+default-dev | librust-base64-0.11+default-dev, librust-buffered-reader-0.18+compression-bzip2-dev, librust-buffered-reader-0.18+compression-deflate-dev, librust-buffered-reader-0.18-dev, librust-bzip2-0.3+default-dev (>= 0.3.2-~~), librust-dyn-clone-1+default-dev, librust-flate2-1+default-dev (>= 1.0.1-~~), librust-idna-0.2+default-dev, librust-lalrpop-0.17+default-dev, librust-lalrpop-util-0.17+default-dev, librust-lazy-static-1+default-dev (>= 1.3-~~), librust-libc-0.2+default-dev, librust-memsec-0.5+default-dev (>= 0.5.6-~~), librust-nettle-7+default-dev, librust-regex-1+default-dev, librust-thiserror-1+default-dev, librust-unicode-normalization-0.1+default-dev (>= 0.1.9-~~), build-essential, fakeroot
> Filtered Build-Depends: debhelper (>= 11), dh-cargo (>= 18), cargo, rustc, libstd-rust-dev, librust-anyhow-1+default-dev, librust-backtrace-0.3+default-dev, librust-base64-0.12+default-dev, librust-buffered-reader-0.18+compression-bzip2-dev, librust-buffered-reader-0.18+compression-deflate-dev, librust-buffered-reader-0.18-dev, librust-bzip2-0.3+default-dev (>= 0.3.2-~~), librust-dyn-clone-1+default-dev, librust-flate2-1+default-dev (>= 1.0.1-~~), librust-idna-0.2+default-dev, librust-lalrpop-0.17+default-dev, librust-lalrpop-util-0.17+default-dev, librust-lazy-static-1+default-dev (>= 1.3-~~), librust-libc-0.2+default-dev, librust-memsec-0.5+default-dev (>= 0.5.6-~~), librust-nettle-7+default-dev, librust-regex-1+default-dev, librust-thiserror-1+default-dev, librust-unicode-normalization-0.1+default-dev (>= 0.1.9-~~), build-essential, fakeroot
> dpkg-deb: building package 'sbuild-build-depends-main-dummy' in '/<<RESOLVERDIR>>/apt_archive/sbuild-build-depends-main-dummy.deb'.
> Ign:1 copy:/<<RESOLVERDIR>>/apt_archive ./ InRelease
> Get:2 copy:/<<RESOLVERDIR>>/apt_archive ./ Release [963 B]
> Ign:3 copy:/<<RESOLVERDIR>>/apt_archive ./ Release.gpg
> Get:4 copy:/<<RESOLVERDIR>>/apt_archive ./ Sources [622 B]
> Get:5 copy:/<<RESOLVERDIR>>/apt_archive ./ Packages [685 B]
> Fetched 2270 B in 0s (0 B/s)
> Reading package lists...
> Reading package lists...
> 
> Install main build dependencies (apt-based resolver)
> ----------------------------------------------------
> 
> Installing build dependencies
> Reading package lists...
> Building dependency tree...
> Some packages could not be installed. This may mean that you have
> requested an impossible situation or if you are using the unstable
> distribution that some required packages have not yet been created
> or been moved out of Incoming.
> The following information may help to resolve the situation:
> 
> The following packages have unmet dependencies:
>  sbuild-build-depends-main-dummy : Depends: librust-dyn-clone-1+default-dev but it is not installable
>                                    Depends: librust-lalrpop-0.17+default-dev
>                                    Depends: librust-nettle-7+default-dev
> E: Unable to correct problems, you have held broken packages.
> apt-get failed.

The full build log is available from:
   http://qa-logs.debian.net/2020/09/26/rust-sequoia-openpgp_0.18.0-1_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.