Re: Assert failed in snprintf.c

Jaime Casanova <jaime.casanova@2ndquadrant.com> writes:
> sqlsmith made it again, attached is the query (run against regression
> database) that makes the assert fail and the backtrace.
> this happens in head only (or at least 11 is fine).

Ah.  Looks like the has_column_privilege stuff is incautious about whether
it's handed a valid table OID:

regression=# select has_column_privilege(42::oid, 'z'::text, 'q'::text);
server closed the connection unexpectedly

In older branches I get

regression=# select has_column_privilege(42::oid, 'z'::text, 'q'::text);
ERROR:  column "z" of relation "(null)" does not exist

but that's only because glibc's snprintf is forgiving about getting a
NULL pointer for %s.  On some other platforms it'd end in SIGSEGV.

Will fix, thanks for report!

            regards, tom lane