[Bug testsuite/34425] New: [gdb/testsuite] FAIL: gdb.threads/leader-exit.exp: single thread has been left

https://sourceware.org/bugzilla/show_bug.cgi?id=34425

            Bug ID: 34425
           Summary: [gdb/testsuite] FAIL: gdb.threads/leader-exit.exp:
                    single thread has been left
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: testsuite
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Created attachment 16859
  --> https://sourceware.org/bugzilla/attachment.cgi?id=16859&action=edit
gdb.log

On aarch64-linux, with taskset -c 0, I get:
...
(gdb) continue^M
Continuing.^M
[New Thread 0xfffff7d1f160 (LWP 62010) (id 2)]^M
[Switching to thread 2 (Thread 0xfffff7d1f160 (LWP 62010))]^M
^M
Thread 2 "leader-exit" hit Breakpoint 2, start (arg=0x0) at leader-exit.c:32^M
32        sleep (10);  /* break-here */^M
(gdb) PASS: gdb.threads/leader-exit.exp: continue to breakpoint: break-here
info threads^M
  Id   Target Id                                                 Frame ^M
  1    Thread 0xfffff7fe8020 (LWP 62008) "leader-exit" (Exiting)
0x0000fffff7d46fa0 \
         in __libc_start_call_main () from /lib64/libc.so.6^M
* 2    Thread 0xfffff7d1f160 (LWP 62010) "leader-exit"           start
(arg=0x0) at \
         leader-exit.c:32^M
(gdb) FAIL: gdb.threads/leader-exit.exp: single thread has been left
...

In a passing version, we have a "Thread exited" message after the continue:
...
(gdb) continue^M
Continuing.^M
[New Thread 0xfffff7cef160 (LWP 1866680) (id 2)]^M
[Thread 0xfffff7ff0020 (LWP 1866678) (id 1) exited]^M
[Switching to thread 2 (Thread 0xfffff7cef160 (LWP 1866680))]^M
^M
Thread 2 "leader-exit" hit Breakpoint 2, start (arg=0x0) at leader-exit.c:32^M
32        sleep (10);  /* break-here */^M
(gdb) PASS: gdb.threads/leader-exit.exp: continue to breakpoint: break-here
...

But here, that's missing.

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