Isuse using GDB 16.3 on Illumos

On Openindiana we have GDB 14.2 working.

I attempt to udate the gdb package to the recent version 16.3 
It builds well but I get problems with debugging corefiles (multi htread):


-- $ gdb
GNU gdb (GDB) 16.3
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-solaris2.11".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
 <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word".
(gdb) file /usr/lib/tracker-store
Reading symbols from /usr/lib/tracker-store...
(No debugging symbols found in /usr/lib/tracker-store)
(gdb) core-file /var/tmp/core.tracker-store.16526 
[New LWP 1]
[New LWP 2]
[New LWP 3]
[New LWP 4]
[New LWP 5]
[New LWP 6]
[New LWP 7]
[New LWP 8]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
--Type <RET> for more, q to quit, c to continue without paging--c
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
[LWP 1 exited]
[New LWP 1]
[LWP 2 exited]
[New LWP 2]
[LWP 3 exited]
[New LWP 3]
[LWP 4 exited]
[New LWP 4]
[LWP 5 exited]
[New LWP 5]
[LWP 6 exited]
[New LWP 6]
[LWP 7 exited]
[New LWP 7]
[LWP 8 exited]
[New LWP 8]
[LWP 9 exited]
[New LWP 9]
/code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/regcache.c:432: internal-error: get_thread_regcache: Assertion `thread->state != THREAD_EXITED' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
----- Backtrace -----
0x7b5d3c gdb_internal_backtrace_1
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/bt-utils.c:121
0x7b5d3c _Z22gdb_internal_backtracev
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/bt-utils.c:182
0xb95c84 internal_vproblem
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/utils.c:423
0xb95fe8 _Z15internal_verrorPKciS0_P13__va_list_tag
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/utils.c:503
0xce7bec _Z18internal_error_locPKciS0_z
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdbsupport/errors.cc:57
0xa6dfb5 _Z19get_thread_regcacheP11thread_info
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/regcache.c:432
0x94455e _Z20post_create_inferiori
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/infcmd.c:255
0x82b9a0 core_target_open
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/corelow.c:1154
0x7ee65c _Z8cmd_funcP16cmd_list_elementPKci
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/cli/cli-decode.c:2748
0xb4e13f _Z15execute_commandPKci
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/top.c:570
0x8dbf70 _Z15command_handlerPKc
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:613
0x8ddb85 _Z20command_line_handlerOSt10unique_ptrIcN3gdb13xfree_deleterIcEEE
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:849
0x8dcc3d gdb_rl_callback_handler
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:288
0xbe0560 rl_callback_read_char
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/readline/readline/callback.c:302
0x8dcdbd gdb_rl_callback_read_char_wrapper_sjlj
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:197
0x8dd02b gdb_rl_callback_read_char_wrapper_noexcept
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:240
0x8dd02b gdb_rl_callback_read_char_wrapper
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/event-top.c:252
0xb8f86f stdin_event_handler
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/ui.c:154
0xce8894 gdb_wait_for_event
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdbsupport/event-loop.cc:694
0xce9013 gdb_wait_for_event
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdbsupport/event-loop.cc:571
0xce9013 _Z16gdb_do_one_eventi
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdbsupport/event-loop.cc:263
0x997571 start_event_loop
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/main.c:402
0x997571 captured_command_loop
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/main.c:466
0x99a264 captured_main
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/main.c:1343
0x99a264 _Z8gdb_mainP18captured_main_args
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/main.c:1362
0x7140b9 main
 /code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/gdb.c:38
---------------------
/code/github/oi-userland/components/developer/gdb/gdb-16.3/gdb/regcache.c:432: internal-error: get_thread_regcache: Assertion `thread->state != THREAD_EXITED' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
<signatureafterquotedtext>Quit this debugging session? (y or n)</signatureafterquotedtext>


The same works with GDB 14.2 in Openindiana package repository. The version 15.2 seems to have te same problem.


Debugging GDB with GDB seems to be a little bit tricky.
Can anyone give me a hint whats going wrong here? Which test in the testsuite is related this task?


Many Thanks! 

Carsten