pgsql: Avoid low-probability crash on out-of-memory.

Avoid low-probability crash on out-of-memory. check_restrict_nonsystem_relation_kind() correctly uses guc_malloc() in v16 and later. But in older branches it must use malloc() directly, and it forgot to check for failure return. Faulty backpatching of 66e94448a. Karina Litskevich Discussion: h

pgsql: Avoid low-probability crash on out-of-memory.

Avoid low-probability crash on out-of-memory. check_restrict_nonsystem_relation_kind() correctly uses guc_malloc() in v16 and later. But in older branches it must use malloc() directly, and it forgot to check for failure return. Faulty backpatching of 66e94448a. Karina Litskevich Discussion: h

pgsql: Avoid low-probability crash on out-of-memory.

Avoid low-probability crash on out-of-memory. check_restrict_nonsystem_relation_kind() correctly uses guc_malloc() in v16 and later. But in older branches it must use malloc() directly, and it forgot to check for failure return. Faulty backpatching of 66e94448a. Karina Litskevich Discussion: h