The fix doesn't seem to work for the Debian package: The jetty base directory /usr/lib/xwiki-jetty is read-only and owned by root in Debian and thus the added mkdir command fails, so nothing changes. I asked Claude Code to test in an actual Debian environment with a Docker container and it found that even making work a symlink to a writable location doesn't help. Suggested options for a fix:
Make Jetty's temp dir explicit via config to a writable path (e.g. set the deploy/context temp dir to /var/lib/xwiki/work), bypassing the base-writability-gated work/auto-detection
Split jetty home/base, relocating jetty.base under /var/lib/xwiki (writable, in ReadWritePaths)
To keep things clean, I'm going to revert the changes for the 18.6.0RC and move this issue to 18.6.0.
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