I found a crash (segmentation fault) on jsonb. This is the best I could do to reduce the query:
""" select 75 as c1 from public.pagg_tab_ml as ref_0, lateral (select ref_0.a as c5 from generate_series(1, 300) as sample_0 fetch first 78 rows only ) as subq_0 where case when (subq_0.c5 < 2) then cast(null as jsonb) else cast(null as jsonb) end ? ref_0.c """
And because it needs pagg_tab_ml it should be run a regression database. This affects at least 14 and 15.
Attached is the backtrace.
Yeah, Coverity has a report about this at function: