E: Unable to locate package clang-format-8 (otherwise it's fine for me to do the upgrade)

Can you remind me why this is necessary and where the user gets this from locally?

@sawenzel there was a discussion with no objections last week at WP3 (see minutes); the rationale was that clang-format-7 still has "some problems" with our code, but I honestly don't know the details. No problem in putting this on hold until tomorrow if you need clarifications from the stakeholders.

About getting this locally, if using Ubuntu I believe you can just have a look at the Travis CI recipe (add an apt source and then install clang-format-8).

Agreed but it would be useful to know the problems and if they are actually solved by bumping.

One of the problem is that when having:

auto [foo, _] = somethingWhichReturnsAPairReference();

the auto [foo, _] is misunderstood as an array and formatted as auto[foo,_].

Fair enough.

OK thanks for clarifying. Merging.