BUG #16690: database connection aborted with a signal 9 when query is run on MacOS Catalina

The following bug has been logged on the website:

Bug reference: 16690
Logged by: Mark Phillips
Email address: mark(dot)phillips(at)mophilly(dot)com
PostgreSQL version: 12.1
Operating system: Various, see note.
Description:

The following query works on...
Windows 10 Education Build 1909 18363.1139 PostgreSQL 12.1, compiled by
Visual C++ build 1914, 64-bit
Mojave 10.14.6 PostgreSQL 12.1 on x86_64-apple-darwin, compiled by Apple
LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn), 64-bit

but causes a database connection to be aborted (signal 9) when run on...
Catalina 10.15.6 PostgreSQL 12.1 on x86_64-apple-darwin, compiled by Apple
LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn), 64-bit

The Query:
SELECT distinct(a.division_order_uid)
FROM division_order A
JOIN division_order divo ON divo.division_order_uid = a.division_order_uid
LEFT JOIN note_division_order an ON an.division_order_uid =
a.division_order_uid
JOIN legal_desc_div land ON a.division_order_uid = land.division_order_uid
LEFT JOIN gpcounty gc ON gc.ctnum = a.ctnum
LEFT JOIN gpstate gs ON gs.stnum = gc.stnum
LEFT JOIN customer dic ON dic.customer_uid = divo.customer_uid
LEFT JOIN customer cst ON cst.customer_uid = divo.customer_uid
LEFT JOIN customer doo ON doo.customer_uid = divo.operator_uid
LEFT JOIN customer dol ON dol.customer_uid = divo.lessee_id
LEFT JOIN division_title dt ON dt.legal_desc_div_uid =
land.legal_desc_div_uid
LEFT JOIN legal_desc_title ldt ON ldt.legal_desc_title_uid =
dt.legal_desc_title_uid
LEFT JOIN legal_title lt ON lt.legal_title_uid = ldt.legal_title_uid
LEFT JOIN doc_type ttp ON ttp.doc_type_code = lt.ttl_type
LEFT JOIN division_lease dl ON dl.legal_desc_div_uid =
land.legal_desc_div_uid
LEFT JOIN legal_desc_lease ldl ON ldl.legal_desc_lease_uid =
dl.legal_desc_lease_uid
LEFT JOIN lease l ON l.lease_uid = ldl.lease_uid
LEFT JOIN doc_type ltp on ltp.doc_type_uid = l.doc_type_uid
LEFT JOIN well_division wd ON wd.legal_desc_div_uid =
land.legal_desc_div_uid
LEFT JOIN legal_desc_well ldw ON ldw.legal_desc_well_uid =
wd.legal_desc_well_uid
LEFT JOIN well w ON w.well_uid = ldw.well_uid
WHERE upper(cst.name) ilike E'%M%'