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Add a guard against uninitialized default locale

Jeff Davis <pgsql@j-davis.com>

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From: Jeff Davis <pgsql@j-davis.com>
To: pgsql-hackers@postgresql.org
Date: 2026-04-24T22:44:23Z
Lists: pgsql-hackers

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Not known to be reachable after dbf217c1c7, but defend against similar
issues in the future. For instance, an extension might encounter the
problem by calling pg_newlocale_from_collation(DEFAULT_COLLATION_OID)
from _PG_init(), and end up with a NULL pointer dereference.

Backport through 17, though patch is different in 17 (also attached).

Regards,
	Jeff Davis

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Guard against uninitialized default locale.