[Pkg-rust-maintainers] Bug#1048774: rust-backtrace-sys: Fails to build source after successful build

[Lucas Nussbaum]

Source: rust-backtrace-sys
Version: 0.1.37-1
Severity: minor
Tags: trixie sid ftbfs
User: lucas at debian.org
Usertags: ftbfs-sab-20230813 ftbfs-source-after-build
User: debian-qa at lists.debian.org
Usertags: qa-doublebuild

Hi,

This package fails to build a source package after a successful build
(dpkg-buildpackage ; dpkg-buildpackage -S).

This is probably a clear violation of Debian Policy section 4.9 (clean target),
but this is filed as severity:minor for now, because a discussion on
debian-devel showed that we might want to revisit the requirement of a working
'clean' target.

More information about this class of issues, included common problems and
solutions, is available at
https://wiki.debian.org/qa.debian.org/FTBFS/SourceAfterBuild

Relevant part of the build log:
> cd /<<PKGBUILDDIR>> && runuser -u user42 -- dpkg-buildpackage --sanitize-env -us -uc -rfakeroot -S
> --------------------------------------------------------------------------------------------------------------------------------------------
> 
> dpkg-buildpackage: info: source package rust-backtrace-sys
> dpkg-buildpackage: info: source version 0.1.37-1
> dpkg-buildpackage: info: source distribution unstable
> dpkg-buildpackage: info: source changed by Wolfgang Silbermayr <wolfgang at silbermayr.at>
>  dpkg-source --before-build .
>  debian/rules clean
> dh clean --buildsystem cargo
>    dh_auto_clean -O--buildsystem=cargo
> debian cargo wrapper: options, profiles, parallel: ['parallel=8'] [] ['-j8']
> debian cargo wrapper: rust_type, gnu_type: x86_64-unknown-linux-gnu, x86_64-linux-gnu
> debian cargo wrapper: running subprocess (['env', 'RUST_BACKTRACE=1', '/usr/bin/cargo', 'clean', '--verbose', '--verbose'],) {'check': True}
>     Removing /<<PKGBUILDDIR>>/target
>    dh_autoreconf_clean -O--buildsystem=cargo
>    dh_clean -O--buildsystem=cargo
>  dpkg-source -b .
> dpkg-source: info: using source format '3.0 (quilt)'
> dpkg-source: info: building rust-backtrace-sys using existing ./rust-backtrace-sys_0.1.37.orig.tar.gz
> dpkg-source: info: using patch list from debian/patches/series
> dpkg-source: warning: ignoring deletion of file Cargo.toml.orig, use --include-removal to override
> dpkg-source: info: local changes detected, the modified files are:
>  rust-backtrace-sys-0.1.37/build.rs
> dpkg-source: error: aborting due to unexpected upstream changes, see /tmp/rust-backtrace-sys_0.1.37-1.diff.mPg5Tx
> dpkg-source: info: Hint: make sure the version in debian/changelog matches the unpacked source tree
> dpkg-source: info: you can integrate the local changes with dpkg-source --commit
> dpkg-buildpackage: error: dpkg-source -b . subprocess returned exit status 2
> 
> E: Command 'cd /<<PKGBUILDDIR>> && runuser -u user42 -- dpkg-buildpackage --sanitize-env -us -uc -rfakeroot -S' failed to run.


The full build log is available from:
http://qa-logs.debian.net/2023/08/13/rust-backtrace-sys_0.1.37-1_unstable.log

If you reassign this bug to another package, please mark it as 'affects'-ing
this package. See https://www.debian.org/Bugs/server-control#affects

If you fail to reproduce this, please provide a build log and diff it with mine
so that we can identify if something relevant changed in the meantime.