Pg 15 devel crashes when fetching data from table using cursor

Hi,
I ran 15devel, compiled today, on Ryzen processor (amd64), with data for
explain.depesz.com.

In psql I ran:

#v+
=$ psql -U depesz_explain
psql (15devel)
Type "help" for help.

(depesz_explain@[local]:5430) 09:46:37 [depesz_explain] 
$ begin;
BEGIN
Time: 0.312 ms
(depesz_explain@[local]:5430) 09:46:40 [depesz_explain] 
*$ DECLARE csr CURSOR FOR select id, plan FROM plans_part_25 WHERE is_public and NOT is_deleted and NOT is_anonymized;
DECLARE CURSOR
Time: 1.486 ms
(depesz_explain@[local]:5430) 09:46:53 [depesz_explain] 
*$ fetch 100 from csr;
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.
Time: 92.067 ms
(@:) 09:47:03 [] 
?$ 
#v-

Pg logs show:

#v+
2022-03-07 09:46:37.179 CET depesz_explain@depesz_explain 526595 [local] LOG:  connection authorized: user=depesz_explain database=depesz_explain application_name=psql
2022-03-07 09:46:40.082 CET depesz_explain@depesz_explain 526595 [local] LOG:  duration: 0.235 ms  statement: begin;
2022-03-07 09:46:53.933 CET depesz_explain@depesz_explain 526595 [local] LOG:  duration: 1.348 ms  statement: DECLARE csr CURSOR FOR select id, plan FROM plans_part_25 WHERE is_public and NOT is_deleted and NOT is_anonymized;
TRAP: FailedAssertion("HaveRegisteredOrActiveSnapshot()", File: "toast_internals.c", Line: 670, PID: 526595)
postgres: depesz_explain depesz_explain [local] FETCH(ExceptionalCondition+0x99)[0x557da5491dc9]
postgres: depesz_explain depesz_explain [local] FETCH(+0x174f64)[0x557da5010f64]
postgres: depesz_explain depesz_explain [local] FETCH(heap_fetch_toast_slice+0x15f)[0x557da50606cf]
postgres: depesz_explain depesz_explain [local] FETCH(+0x16c374)[0x557da5008374]
postgres: depesz_explain depesz_explain [local] FETCH(detoast_attr+0x18d)[0x557da500884d]
postgres: depesz_explain depesz_explain [local] FETCH(text_to_cstring+0x16)[0x557da5467796]
postgres: depesz_explain depesz_explain [local] FETCH(OutputFunctionCall+0x58)[0x557da549c7c8]
postgres: depesz_explain depesz_explain [local] FETCH(+0x170fc5)[0x557da500cfc5]
postgres: depesz_explain depesz_explain [local] FETCH(+0x4cc4ee)[0x557da53684ee]
postgres: depesz_explain depesz_explain [local] FETCH(+0x4cc626)[0x557da5368626]
postgres: depesz_explain depesz_explain [local] FETCH(PortalRun+0x191)[0x557da5369e71]
postgres: depesz_explain depesz_explain [local] FETCH(+0x4c9ceb)[0x557da5365ceb]
postgres: depesz_explain depesz_explain [local] FETCH(PostgresMain+0x1708)[0x557da5367828]
postgres: depesz_explain depesz_explain [local] FETCH(+0x432073)[0x557da52ce073]
postgres: depesz_explain depesz_explain [local] FETCH(PostmasterMain+0xd5d)[0x557da52cf0ad]
postgres: depesz_explain depesz_explain [local] FETCH(main+0x20f)[0x557da4ff99bf]
/lib/x86_64-linux-gnu/libc.so.6(+0x29fd0)[0x7f7ba79dcfd0]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x7d)[0x7f7ba79dd07d]
postgres: depesz_explain depesz_explain [local] FETCH(_start+0x25)[0x557da4ff9d15]
2022-03-07 09:47:03.298 CET @ 508510  LOG:  server process (PID 526595) was terminated by signal 6: Aborted
2022-03-07 09:47:03.298 CET @ 508510  DETAIL:  Failed process was running: fetch 100 from csr;
2022-03-07 09:47:03.298 CET @ 508510  LOG:  terminating any other active server processes
2022-03-07 09:47:03.299 CET [unknown]@[unknown] 527019 [local] LOG:  connection received: host=[local]
2022-03-07 09:47:03.299 CET depesz_explain@depesz_explain 527019 [local] FATAL:  the database system is in recovery mode
2022-03-07 09:47:03.299 CET @ 508510  LOG:  all server processes terminated; reinitializing
2022-03-07 09:47:03.316 CET @ 527022  LOG:  database system was interrupted; last known up at 2022-03-07 09:45:57 CET
2022-03-07 09:47:03.558 CET @ 527022  LOG:  database system was not properly shut down; automatic recovery in progress
2022-03-07 09:47:03.566 CET @ 527022  LOG:  redo starts at 0/F61B64E0
2022-03-07 09:47:03.566 CET @ 527022  LOG:  invalid record length at 0/F61B6518: wanted 24, got 0
2022-03-07 09:47:03.566 CET @ 527022  LOG:  redo done at 0/F61B64E0 system usage: CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s
2022-03-07 09:47:03.578 CET @ 527023  LOG:  checkpoint starting: end-of-recovery immediate wait
2022-03-07 09:47:03.585 CET @ 527023  LOG:  checkpoint complete: wrote 3 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.002 s, sync=0.001 s, total=0.008 s; sync files=2, longest=0.001 s, average=0.001 s; distance=0 kB, estimate=0 kB
2022-03-07 09:47:03.587 CET @ 508510  LOG:  database system is ready to accept connections
#v-

Interestingly, I can select the data if I don't use cursor:

#v+
$ select id, plan FROM plans_part_25 WHERE is_public and NOT is_deleted and NOT is_anonymized \g | wc
1162074 11448274 1337357239722
Time: 213.767 ms
#v-

Details about the table:

#v+
$ \d+ plans_part_25
                                                    Table "public.plans_part_25"
      Column      │           Type           │ Collation │ Nullable │ Default │ Storage  │ Compression │ Stats target │ Description 
──────────────────┼──────────────────────────┼───────────┼──────────┼─────────┼──────────┼─────────────┼──────────────┼─────────────
 id               │ text                     │           │ not null │         │ extended │             │              │ 
 plan             │ text                     │           │ not null │         │ extended │             │              │ 
 entered_on       │ timestamp with time zone │           │ not null │ now()   │ plain    │             │              │ 
 is_public        │ boolean                  │           │ not null │ true    │ plain    │             │              │ 
 is_anonymized    │ boolean                  │           │ not null │ false   │ plain    │             │              │ 
 title            │ text                     │           │          │         │ extended │             │              │ 
 delete_key       │ text                     │           │          │         │ extended │             │              │ 
 is_deleted       │ boolean                  │           │ not null │ false   │ plain    │             │              │ 
 added_by         │ text                     │           │          │         │ extended │             │              │ 
 optimization_for │ text                     │           │          │         │ extended │             │              │ 
 query            │ text                     │           │          │         │ extended │             │              │ 
Partition of: plans FOR VALUES WITH (modulus 50, remainder 25)
Partition constraint: satisfies_hash_partition('16523'::oid, 50, 25, id)
Indexes:
    "part_25_pkey" PRIMARY KEY, btree (id)
    "part_25_added_by_entered_on_id_idx" UNIQUE, btree (added_by, entered_on, id) WHERE is_deleted = false
    "part_25_added_by_idx" btree (added_by)
    "part_25_entered_on_idx" btree (entered_on)
    "part_25_entered_on_idx1" btree (entered_on) WHERE is_public AND NOT is_deleted
    "part_25_length_idx" btree (length(plan)) WHERE NOT is_anonymized AND is_public
    "part_25_optimization_for_idx" btree (optimization_for) WHERE NOT is_deleted
Access method: heap

$ select pg_column_compression(plan), count(*) FROM plans_part_25 WHERE is_public and NOT is_deleted and NOT is_anonymized group by 1;
 pg_column_compression │ count 
───────────────────────┼───────
 [null]                │  3272
 pglz                  │  6556
(2 rows)
#v-

Information about compilation:

#v+
=$ pg_config --configure
 '--prefix=/home/pgdba/work' '--with-pgport=5430' '--with-tcl' '--with-perl' '--with-python' '--enable-integer-datetimes' '--without-pam' '--without-bonjour' '--with-openssl' '--with-uuid=ossp' '--with-readline' '--with-libxml' '--with-systemd' '--with-zlib' '--with-lz4' '--with-llvm' '--with-gnu-ld' '--enable-debug' '--enable-depend' '--enable-cassert' 'PYTHON=/usr/bin/python3'

=$ dpkg -l | grep -iE '^ii[[:space:]]*(lib)?(gcc|clang|llvm|lz4|zlib)'
ii  clang                                         1:13.0-53~exp1                              amd64        C, C++ and Objective-C compiler (LLVM based), clang binary
ii  clang-13                                      1:13.0.0-2                                  amd64        C, C++ and Objective-C compiler
ii  gcc                                           4:11.2.0-1ubuntu1                           amd64        GNU C compiler
ii  gcc-11                                        11.2.0-7ubuntu2                             amd64        GNU C compiler
ii  gcc-11-aarch64-linux-gnu                      11.2.0-5ubuntu1cross1                       amd64        GNU C compiler (cross compiler for arm64 architecture)
ii  gcc-11-aarch64-linux-gnu-base:amd64           11.2.0-5ubuntu1cross1                       amd64        GCC, the GNU Compiler Collection (base package)
ii  gcc-11-base:amd64                             11.2.0-7ubuntu2                             amd64        GCC, the GNU Compiler Collection (base package)
ii  gcc-11-cross-base                             11.2.0-5ubuntu1cross1                       all          GCC, the GNU Compiler Collection (library base package)
ii  gcc-aarch64-linux-gnu                         4:11.2.0-1ubuntu1                           amd64        GNU C compiler for the arm64 architecture
ii  libclang-common-13-dev                        1:13.0.0-2                                  amd64        Clang library - Common development package
ii  libclang-cpp13                                1:13.0.0-2                                  amd64        C++ interface to the Clang library
ii  libclang1-13                                  1:13.0.0-2                                  amd64        C interface to the Clang library
ii  libgcc-11-dev:amd64                           11.2.0-7ubuntu2                             amd64        GCC support library (development files)
ii  libgcc-11-dev-arm64-cross                     11.2.0-5ubuntu1cross1                       all          GCC support library (development files)
ii  libgcc-s1:amd64                               11.2.0-7ubuntu2                             amd64        GCC support library
ii  libgcc-s1-arm64-cross                         11.2.0-5ubuntu1cross1                       all          GCC support library (arm64)
ii  libllvm12:amd64                               1:12.0.1-8build1                            amd64        Modular compiler and toolchain technologies, runtime library
ii  libllvm13:amd64                               1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies, runtime library
ii  liblz4-1:amd64                                1.9.3-2                                     amd64        Fast LZ compression algorithm library - runtime
ii  liblz4-dev:amd64                              1.9.3-2                                     amd64        Fast LZ compression algorithm library - development files
ii  llvm                                          1:13.0-53~exp1                              amd64        Low-Level Virtual Machine (LLVM)
ii  llvm-13                                       1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies
ii  llvm-13-dev                                   1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies, libraries and headers
ii  llvm-13-linker-tools                          1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies - Plugins
ii  llvm-13-runtime                               1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies, IR interpreter
ii  llvm-13-tools                                 1:13.0.0-2                                  amd64        Modular compiler and toolchain technologies, tools
ii  llvm-runtime                                  1:13.0-53~exp1                              amd64        Low-Level Virtual Machine (LLVM), bytecode interpreter
ii  zlib1g:amd64                                  1:1.2.11.dfsg-2ubuntu7                      amd64        compression library - runtime
ii  zlib1g-dev:amd64                              1:1.2.11.dfsg-2ubuntu7                      amd64        compression library - development
#v-

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