[Bug 271604] ifconfig ix0.<vlan> create leads to crash

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 24 May 2023 11:11:19 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271604

            Bug ID: 271604
           Summary: ifconfig ix0.<vlan> create leads to crash
           Product: Base System
           Version: 13.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: pi@FreeBSD.org

The last lines in /var/log/kern:

May 24 12:03:52 kernel: ix0: link state changed to DOWN
May 24 12:04:14 kernel: ix0: link state changed to UP

After that, it crashed and generated /var/crash/vmcore.0, but core.txt.0 says:

Unable to find a kernel debugger.
Please install the devel/gdb port or gdb package.

How can I try to generate a core.txt.0, after I install gdb ?

Does this crash relate to
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221317

Thanks!

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