Re: Server crashed with "TRAP: unrecognized TOAST vartag("1", File:"heaptuple.c", Line: 1490)"

Hi,

On 2018-06-28 16:08:31 +0530, Rajkumar Raghuwanshi wrote:
> I am getting server crash with below test case, logfile message and core
> dump details in the mail.

Which versions are affected here? Is this reproducible in postgres 10 or
just the current beta?


> postgres=# CREATE TABLE part_tbl (a INT, b TEXT, c INT) PARTITION BY
> RANGE(a);
> CREATE TABLE
> postgres=# CREATE TABLE part_tbl_p PARTITION OF part_tbl FOR VALUES FROM
> (minvalue) TO (maxvalue);
> CREATE TABLE
> postgres=# CREATE INDEX partidx_abc_idx ON part_tbl (a, b, c);
> CREATE INDEX
> postgres=# INSERT INTO part_tbl (a, b, c) SELECT i,i,i FROM
> generate_series(1,50)i;
> INSERT 0 50
> postgres=# ANALYZE part_tbl;
> ANALYZE
> postgres=# ALTER TABLE part_tbl ALTER COLUMN c TYPE numeric;
> server closed the connection unexpectedly
>     This probably means the server terminated abnormally
>     before or while processing the request.
> The connection to the server was lost. Attempting reset: Failed.
> !>
> 
> 
> --logfile
> TRAP: unrecognized TOAST vartag("1", File: "heaptuple.c", Line: 1490)
> 2018-06-28 00:01:01.679 IST [97062] LOG:  server process (PID 97080) was
> terminated by signal 6: Aborted
> 2018-06-28 00:01:01.679 IST [97062] DETAIL:  Failed process was running:
> ALTER TABLE part_tbl ALTER COLUMN c TYPE numeric;

Likely a memory lifetime issue or something like that.

Greetings,

Andres Freund