I get these double free errors too. The problems started when zypper was updated to
version 1.14.45. I downgraded one host to zypper 1.14.42, libzypp.so.1722.3.7 and
libboost_thread.so.1.75.0, but the problem persists. The bug might be caused by a library
that zypper depends on and that was updated at the same time.
I use Tumbleweed in unprivileged LXC containers on a Fedora 34 host with my own kernel and
lots of memory-related settings from
I solved the problem by migrating most containers to Fedora. Thus I am not that interested
in debugging the crashes.