2. PostgreSQL Server Subprocess Went down at function 'datumTransfer'

Description: PostgreSQL Server Subprocess Went down at function
'datumTransfer'

PostgreSQL Server Version: PostgreSQL 15.2 on x86_64-pc-linux-gnu, compiled
by Ubuntu clang version 12.0.1, 64-bit

Discoverer: Jingzhou Fu, Jie Liang and Zhiyong Wu in WingTecher Lab of
Tsinghua University and Shuimuyulin ltd

Email address: fjz22(at)mails(dot)tsinghua(dot)edu(dot)cn , wuzy21(at)mails(dot)tsinghua(dot)edu(dot)cn
, ljiee(at)mail(dot)tsinghua(dot)edu(dot)cn

Way to Reproduce with Docker (write the poc content into file PoC.sql):

```bash

docker container rm some-postgres -f

docker run --name some-postgres -p 5432:5432 -e
POSTGRES_PASSWORD=mysecretpassword -d postgres:15.2

sleep 5 # wait the server start .

docker exec -i some-postgres psql --user=postgres < PoC.sql

# Output:

# server closed the connection unexpectedly

# This probably means the server terminated abnormally

# before or while processing the request.

# connection to server was lost

```

PoC:

```sql

CREATE TYPE foo;

CREATE FUNCTION bar(foo)

RETURNS cstring

AS 'int4out'

LANGUAGE internal STRICT IMMUTABLE;

CREATE FUNCTION box_tbl(cstring) RETURNS foo AS 'boolin'

LANGUAGE internal IMMUTABLE STRICT;

CREATE TYPE foo(INPUT = box_tbl, OUTPUT = bar);

do $$

declare r foo;

begin

for r in values (1,2),(3,4),(6,5) loop

raise notice 'r = %', r;

end loop;

end$$;

```

Backtrace:

```

#0 0x1831798 (datumTransfer+0x68)

#1 0x7f09381c4e5e (exec_assign_value+0x84e)

#2 0x7f09381eb04c (exec_move_row_from_fields+0x13ac)

#3 0x7f09381bd03c (exec_move_row+0x7fc)

#4 0x7f09381df6bd (exec_for_query+0x92d)

#5 0x7f09381d124b (exec_stmt_fors+0x15b)

#6 0x7f09381c6fa0 (exec_stmts+0x910)

#7 0x7f09381c41d2 (exec_stmt_block+0x1de2)

#8 0x7f09381bd574 (exec_toplevel_block+0x234)

#9 0x7f09381b7023 (plpgsql_exec_function+0x11f3)

#10 0x7f093821b3dd (plpgsql_inline_handler+0x83d)

#11 0x1cc01da (FunctionCall1Coll+0x3ca)

#12 0x1cc4e45 (OidFunctionCall1Coll+0x105)

#13 0xcb357d (ExecuteDoStmt+0xecd)

#14 0x16fb7b0 (standard_ProcessUtility+0x1190)

#15 0x16fa617 (ProcessUtility+0xa7)

#16 0x16f9667 (PortalRunUtility+0x2a7)

#17 0x16f7606 (PortalRunMulti+0xa96)

#18 0x16f559b (PortalRun+0x9cb)

#19 0x16e9694 (exec_simple_query+0xe04)

#20 0x16e7a63 (PostgresMain+0x1523)

#21 0x144c17b (BackendRun+0xbb)

#22 0x144ad85 (BackendStartup+0x525)

#23 0x14481e6 (ServerLoop+0x616)

#24 0x1443e0f (PostmasterMain+0x30cf)

#25 0x106ebf2 (main+0x5a2)

#26 0x7f094417a083 (__libc_start_main+0xf3)

#27 0x49fc0e (_start+0x2e)```