On Wed, Mar 31, 2021 at 11:26:14 -0400, Josef 'Jeff' Sipek wrote:

On Wed, Mar 31, 2021 at 09:07:28 +0200, Christian Ehrhardt wrote:

On Wed, Mar 31, 2021 at 8:46 AM Christian Ehrhardt <christian.ehrhardt@canonical.com> wrote:

On Tue, Mar 30, 2021 at 9:21 PM Josef 'Jeff' Sipek <jeff.sipek@open-xchange.com> wrote:

...

The culprit seems to be LTO.  If you disable LTO, everything should work
just fine.

I've had LTO disabled and it has still shown the same effect (with my
gcc 10.2.0-1).
I'll give it a non-LTO retry and double check if it really changed the
compile options accordingly.
I'll let you know about that later on.

Indeed, I wonder what I tried yesterday in regard to LTO then .. :-/
I can confirm that disabling LTO fixes the issue for me as well and
for now that should be a good mitigation until the root cause is found
and fixed.

Sounds good.  Thanks for the confirmation.

Does the following patch make the tests pass for you?  We still need to
clean it up a bit, but I figured I'd share the work-in-progress version to
make sure we're seeing the same issues as you.  (And the obvious disclaimer:
this patch hasn't gone through the usual before-commit scrutiny, so don't
ship it.)