Hi,

During a rebuild of all packages in sid, your package failed to build
on ppc64el. At the same time, it did not fail on amd64.

I'm marking this bug as severity:serious since your package has only
Architecture:all binary packages, and should thus, in theory, build
everywhere. Failure to build on ppc64el might indicate a serious issue
in this package or in another package.

But feel free to downgrade or close if you believe that this is only a
build-time issue. (I would personnally prefer a severity:minor bug just to
track that the package can only be built on specific architectures.)

Relevant part (hopefully):
http://qa-logs.debian.net/2020/12/09/backward-cpp_1.5-2_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!

If you reassign this bug to another package, please marking 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 me
so that we can identify if something relevant changed in the meantime.

About the archive rebuild: The rebuild was done on a Power8 cluster part of the
Grid'5000 testbed. Hardware specs: https://www.grid5000.fr/w/Grenoble:Hardware#drac