Non-reproducible build, errors about diffscope in log

[Filip Strömbäck]

Dear reproducible builds team,

Thank you for your work in this area!

I just noticed that one of my packages, storm-lang [1], was marked as 
unreproducible in forky (even though the same version is reproducible in 
sid).

Looking into the situation closer, I noticed that the (usually very 
nice) diffscope diff was missing. Looking at the rbuild [2], it has the 
following error messages towards the end:

E: 10mount: error: Directory 
'/schroots/reproducible-forky-diffoscope-20260311-15326' does not exist
E: 
jenkins-reproducible-forky-diffoscope-80d31a88-141c-4f42-b14d-773423de8a2b: 
Chroot setup failed: stage=setup-start

I am unsure if failure to run diffoscope is what causes the build to be 
marked as unreproducible (The message about nonreproducible is before 
the error, but I noted that diffoscope is always executed.)

Regardless, I thought it would be useful to let you know about this 
potential problem.

Greetings,
   Filip

[1]: 
https://tests.reproducible-builds.org/debian/rb-pkg/forky/arm64/storm-lang.html
[2]: 
https://tests.reproducible-builds.org/debian/rbuild/forky/arm64/storm-lang_0.7.5-2.rbuild.log.gz