[PATCH 0/2] ci: detect more warnings via `-Og`

Hi,

this patch series is triggered by the thread at [1], where Peff noted a potentially-uninitialized variable. In theory, GCC is able to diagnose such issues via `-Wmaybe-uninitialized`. But in practice, this warning is dependent on the optimization level used by GCC, where the issue in the thread is only noticed when compiling with `-Og`.

The first patch is just a small fix to our CI I found while at it. The second patch adapts our "pedantic" job to compile with `-Og` so that we overall surface more issues. This would've catched the issue.

Patrick

[1]: <20240605100728.GA3440281@coredump.intra.peff.net>

Patrick Steinhardt (2):
  ci: fix check for Ubuntu 20.04
  ci: let pedantic job compile with -Og

 ci/lib.sh                 | 2 +-
 ci/run-build-and-tests.sh | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)