FESCo has given us the go-ahead to turn zchunk metadata on again[1] for the F30 fedora repository after the librepo segmentation fault bug[2] was fixed. An updated librepo[3] was built a week ago and was pushed to stable five days ago, so most beta users should have the new version.
If you're using F30 and have librepo-1.9.6-1.fc30, please update to librepo-1.9.6-2.fc30 as soon as possible! If you don't, you will once again get a segmentation fault when running dnf.
If you find yourself getting a segmentation fault when running dnf on a system with librepo-1.9.6-1.fc30, you can temporarily work around it by doing the following:
1. Edit /etc/dnf/dnf.conf and add the following line:
zchunk=False
2. Run: dnf update librepo
Verify that you got librepo-1.9.6-2.fc30 or later in the update
3. Remove the 'zchunk=False' line you added to /etc/dnf/dnf.conf
4. Run: dnf update
At this point, dnf should download the repository metadata without any segmentation faults, and any further repository metadata downloads should be significantly smaller.
Jonathan
1. https://pagure.io/fesco/issue/2116 2. https://lists.fedoraproject.org/archives/list/devel-announce@lists.fedorapro... 3. https://bodhi.fedoraproject.org/updates/FEDORA-2019-07c3e09858
devel-announce@lists.fedoraproject.org
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Jonathan Dieter