This release addresses a memory safety issue in our interaction with libmysqlclient. There was an undocumented assumption made by that library which we were not taking into consideration, resulting in a use-after-free bug. This was resulting in a segmentation fault on some systems.
While this issue is quite serious, we are not issuing a CVE or a security advisory. The bug resulted in 4 bytes being written to a handful of values. It could not be exploited to cause a security issue.