Buildbot kernel build rpm error

Buildbot kernel build rpm error

[Steve French]

Any ideas why every other build of the kernel (for the buildbot
automated testing) fails with this (even if no code changed):

See e.g. http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com/#/builders/2/builds/569
(and every other test run before that in last few days)

Wrote: /root/rpmbuild/RPMS/x86_64/kernel-5.12.0_rc7-1.x86_64.rpm
Wrote: /root/rpmbuild/RPMS/x86_64/kernel-headers-5.12.0_rc7-1.x86_64.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.1YI7Dw
+ umask 022
+ cd .
+ rm -rf /root/rpmbuild/BUILDROOT/kernel-5.12.0_rc7-1.x86_64
+ exit 0
[*] stored new cache build
/tmp/kbuildcache/148df99b5d245d132a1fba07a172097721299031be12e092d324a1c02fcd68f5
[*] removing old cache entry
/tmp/kbuildcache/9bbac9f327189cbe0e7ab4816965528b82ac537e1f2b5267d139ef874f48874f
Traceback (most recent call last):
  File "/root/buildbot/scripts/kernel-cache", line 117, in <module>
    main()
  File "/root/buildbot/scripts/kernel-cache", line 37, in main
    cache.add_cache(args.rev, args.config, args.files)
  File "/root/buildbot/scripts/kernel-cache", line 92, in add_cache
    shutil.rmtree(e)
  File "/usr/lib64/python3.6/shutil.py", line 477, in rmtree
    onerror(os.lstat, path, sys.exc_info())
  File "/usr/lib64/python3.6/shutil.py", line 475, in rmtree
    orig_st = os.lstat(path)
TypeError: lstat: path should be string, bytes or os.PathLike, not tuple


Repeating the build it works (this seems new to 5.12-rc7)


-- 
Thanks,

Steve