latest zfec fails on oraclelinux-8 builder

[meejah]

Two options:

• pin to older zfec on that platform (possible?)
• no longer care about that platform (delete builder)

[blaisep]

Apparently Fedora also depends on this.

[btlogy]

Would this not be fixed by dropping support for Python 3.8 (EOL) in favor of 3.9: see #4131?

But if the answer is yes, I'm not sure who else than JP could publish a new tahoelafsci image in Docker Hub: see #4142 trying to sort this out.

[btlogy]

Since I had bumped into problem related to Pyhon 3.8 while trying the oraclelinux-8 unit test on GHA instead of CircleCI last week, I've already tried and successfully bumped to python 3.9. The CI job went well, effectively pulling zfec==1.6.0.0:

​https://github.com/LeastAuthority/tahoe-lafs/actions/runs/12144760020/job/33871805207?pr=8

So, it seem like the smallest change would be to bump Python 3.8 to 3.9 for this oraclelinux builder, publish the new image and current unit test should got green with the latest zfec.

See ticket:4131 and ​PR#1406

[btlogy]

From the build logs of ​PR#1406, I can confirm that latest zfec==1.6.0.0 is now ​successfully used to build and unit test tahoe-lafs on oraclelinx-8.

So we can close this ticket whenever ​PR#1406 (pending on ​PR#1409) is merged.

[btlogy]

The proposed ​PR#1406 has been rejected in favor or a new one ​PR#1418 in has NOT re-activated oraclelinux-8 builder (using zfec==1.6.0.0 as described in the previous comment).

This missing part could be completed in the context of ticket:4143.

[meejah]

1406 was not "rejected", the draft PR was closed by mistake (and since re-opened, by me even though I said "please re-open if I got this wrong" when closing it in the first place).