[ovirt-devel] VDSM build failure: unsupported pickle protocol: 5

hi, I'm trying to enable copr builds for vdsm ( https://gerrit.ovirt.org/c/vdsm/+/117368 ) And it's currently failing to rebuild src.rpm (generated on Fedora 34) for el8 with the following error: ( https://download.copr.fedorainfracloud.org/results/ovirt/ovirt-master-sna... ) make[2]: Entering directory '/builddir/build/BUILD/vdsm-4.50.0.1/lib/vdsm' Making all in api make[3]: Entering directory '/builddir/build/BUILD/vdsm-4.50.0.1/lib/vdsm/api' Generate vdsm-api.html chmod u+w . PYTHONPATH=./../../:./../../vdsm \ ./schema_to_html.py vdsm-api ./vdsm-api.html Traceback (most recent call last): File "./schema_to_html.py", line 250, in <module> main() File "./schema_to_html.py", line 245, in main api_schema = vdsmapi.Schema((schema_type,), strict_mode=False) File "/builddir/build/BUILD/vdsm-4.50.0.1/lib/vdsm/api/vdsmapi.py", line 145, in __init__ loaded_schema = pickle.loads(f.read()) ValueError: unsupported pickle protocol: 5 make[3]: *** [Makefile:697: vdsm-api.html] Error 1 make[3]: Leaving directory '/builddir/build/BUILD/vdsm-4.50.0.1/lib/vdsm/api' make[2]: *** [Makefile:644: all-recursive] Error 1 make[2]: Leaving directory '/builddir/build/BUILD/vdsm-4.50.0.1/lib/vdsm' make[1]: *** [Makefile:466: all-recursive] Error 1 make[1]: Leaving directory '/builddir/build/BUILD/vdsm-4.50.0.1/lib' make: *** [Makefile:539: all-recursive] Error 1 error: Bad exit status from /var/tmp/rpm-tmp.nDfLzv (%build) Sounds like the make dist process ran on Fedora 34 brings a source file used at build time on el8 in a cpickle format which is not backward compatible. Seems to be a bug, the cpickle shouldn't be included in the tar.gz, it should be generated at build time. Comments? -- Sandro Bonazzola MANAGER, SOFTWARE ENGINEERING, EMEA R&D RHV Red Hat EMEA <https://www.redhat.com/> sbonazzo(a)redhat.com <https://www.redhat.com/> *Red Hat respects your work life balance. Therefore there is no need to answer this email out of your office hours.*