Originally the crash was observed in regular concurrent tests on a debug build, but couldn't be reproduced. The stack trace from the original crash is at the end of the description.
The test case from
MDEV-23239 produces a similarly-looking ASAN failure on the current 10.3 ASAN builds:
and a slightly different ASAN failures on 10.4-10.5 ASAN builds:
The original crash from 2018: