login: SQDEMO e2e: M_SLEEPQ polluted with 0xAA, running sleepq lock/add/wait round trip
panic: assertion "wc->wc_wchan == NULL && wc->wc_refs == 0" failed in sleepq_lock at /usr/src/sys/kern/subr_sleepqueue.c:209
cpuid = 5
Trace beginning at frame 0xfffff80118125a50
sleepq_lock() at sleepq_lock+0x200 0xffffffff8069df00 
sleepq_lock() at sleepq_lock+0x200 0xffffffff8069df00 
sq_sleeper() at sq_sleeper+0x10 0xffffffff826000b0 
Debugger("panic")

CPU5 stopping CPUs: 0x0000001f
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbd9f19(%rip)
db>