[Bug breakpoints/29277] jit_event_handler: Assertion `jiter->jiter_data != nullptr' failed with separate debug files

["schwab@linux-m68k.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29277

--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
I'm seeing this on riscv64:

$ gdb/gdb --args qemu-riscv64 /usr/bin/cat
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Reading symbols from qemu-riscv64...
Reading symbols from
/usr/lib/debug/usr/bin/qemu-riscv64-7.0.0-82.1.riscv64.debug...
(gdb) r
Starting program: /usr/bin/qemu-riscv64 /usr/bin/cat
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/lp64d/libthread_db.so.1".
[New Thread 0x3ff7ffb3c0 (LWP 1363)]
../../gdb/gdb/jit.c:1247: internal-error: jit_event_handler: Assertion
`jiter->jiter_data != nullptr' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
----- Backtrace -----
0x8c5cd gdb_internal_backtrace_1
        ../../gdb/gdb/bt-utils.c:122
0x8c5cd _Z22gdb_internal_backtracev
        ../../gdb/gdb/bt-utils.c:168
0x330621 internal_vproblem
        ../../gdb/gdb/utils.c:396
0x3307f5 _Z15internal_verrorPKciS0_Pv
        ../../gdb/gdb/utils.c:476
0x3b50cd _Z14internal_errorPKciS0_z
        ../../gdb/gdbsupport/errors.cc:55
0x1a9cfd _Z17jit_event_handlerP7gdbarchP7objfile
        ../../gdb/gdb/jit.c:1247
0x7b1b5 handle_jit_event
        ../../gdb/gdb/breakpoint.c:5672
0x7b1b5 _Z20bpstat_run_callbacksP6bpstat
        ../../gdb/gdb/breakpoint.c:5875
0x19ef05 process_event_stop_test
        ../../gdb/gdb/infrun.c:6651
0x1a22eb handle_stop_requested
        ../../gdb/gdb/infrun.c:4627
0x1a22eb handle_stop_requested
        ../../gdb/gdb/infrun.c:4622
0x1a22eb handle_inferior_event
        ../../gdb/gdb/infrun.c:5883
0x1a3c0d _Z20fetch_inferior_eventv
        ../../gdb/gdb/infrun.c:4233
0x3b53c9 gdb_wait_for_event
        ../../gdb/gdbsupport/event-loop.cc:692
0x3b585d _Z16gdb_do_one_eventv
        ../../gdb/gdbsupport/event-loop.cc:210
0x1d5a29 start_event_loop
        ../../gdb/gdb/main.c:411
0x1d5a29 captured_command_loop
        ../../gdb/gdb/main.c:471
0x1d70e9 captured_main
        ../../gdb/gdb/main.c:1329
0x1d70e9 _Z8gdb_mainP18captured_main_args
        ../../gdb/gdb/main.c:1344
0x21137 main
        ../../gdb/gdb/gdb.c:32
---------------------
../../gdb/gdb/jit.c:1247: internal-error: jit_event_handler: Assertion
`jiter->jiter_data != nullptr' failed.


(top-gdb) p jit_bp_sym.objfile.jiter_data
$2 = {
  _M_t = {<std::__uniq_ptr_impl<jiter_objfile_data,
std::default_delete<jiter_objfile_data> >> = {
      _M_t = {<std::_Tuple_impl<0, jiter_objfile_data*,
std::default_delete<jiter_objfile_data> >> = {<std::_Tuple_impl<1,
std::default_delete<jiter_objfile_data> >> = {<std::_Head_base<1,
std::default_delete<jiter_objfile_data>, true>> = {_M_head_impl = {<No data
fields>}}, <No data fields>}, <std::_Head_base<0, jiter_objfile_data*, false>>
= {
            _M_head_impl = 0x0}, <No data fields>}, <No data fields>}}, <No
data fields>}}
(top-gdb) p jit_bp_sym.objfile.separate_debug_objfile_backlink.jiter_data
$5 = {
  _M_t = {<std::__uniq_ptr_impl<jiter_objfile_data,
std::default_delete<jiter_objfile_data> >> = {
      _M_t = {<std::_Tuple_impl<0, jiter_objfile_data*,
std::default_delete<jiter_objfile_data> >> = {<std::_Tuple_impl<1,
std::default_delete<jiter_objfile_data> >> = {<std::_Head_base<1,
std::default_delete<jiter_objfile_data>, true>> = {_M_head_impl = {<No data
fields>}}, <No data fields>}, <std::_Head_base<0, jiter_objfile_data*, false>>
= {
            _M_head_impl = 0xa9f8e0}, <No data fields>}, <No data fields>}},
<No data fields>}}

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