Re: BUG #18879: PostgreSQL returns memory error.

PG Bug reporting form <noreply@postgresql.org> writes:
> CREATE LOCAL TEMP TABLE IF NOT EXISTS v878825600 ( c878825601 INT
> COMPRESSION DEFAULT CONSTRAINT cons_878825602 REFERENCES v878825600 MATCH
> SIMPLE ON UPDATE NO ACTION ON DELETE SET DEFAULT ( c878825601, c878825601,
> c878825601, c878825601, c878825601, c878825601, c878825601 ) PRIMARY KEY )
> ON COMMIT DELETE ROWS;

Thanks for the report.  A less illegible repro is

regression=# create temp table v1 (c1 int primary key references v1 on delete set default (c1,c1));
WARNING:  problem in alloc set PortalContext: detected write past chunk end in block 0x2c25bc0, chunk 0x2c25e20
WARNING:  problem in alloc set PortalContext: detected write past chunk end in block 0x2c25bc0, chunk 0x2c25e20
CREATE TABLE

(With more repetitions of "c1" you can get a crash.)  It looks like
we're not being careful to reject duplicates in the SET DEFAULT list.

            regards, tom lane