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Crash with HEAD on amd64 - in setrunnable()

With a very current kernel, I just got this:

# crash -M /var/crash/netbsd.21.core -N /netbsd.gdb
Crash version 9.99.18, image version 9.99.18.
System panicked: kernel diagnostic assertion "lwp_locked(l, l->l_cpu->ci_schedstate.spc_lwplock)" failed: file "/build/netbsd-local/src_ro/sys/kern/kern_synch.c", line 910
Backtrace from time of crash is available.
crash> bt
?() at ffffde890ce0af54
vpanic() at vpanic+0x181
kern_assert() at kern_assert+0x48
setrunnable() at setrunnable+0x179
lwp_start() at lwp_start+0xba
do_lwp_create() at do_lwp_create+0xa1
sys__lwp_create() at sys__lwp_create+0xc1
syscall() at syscall+0x28a
--- syscall (number 309) ---

(Obviously, I have a core dump, so I'll be happy to investigate further
if anyone has suggestions.)

| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
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