panic: Data modified on freelist: word 4 of object 0xffff800001620000 size 0x1d8 previous type free (0x0 != 0xdeadbeef)

Starting stack trace...
panic(ffffffff8332f550) at panic+0x1ba sys/kern/subr_prf.c:229
malloc(1d8,7f,1) at malloc+0xdb6 sys/kern/kern_malloc.c:355
ktrgenio(ffff80002a7b8a70,3,1,ffff800000b4ad80,1d0) at ktrgenio+0x141 sys/kern/kern_ktrace.c:249
dofilewritev(ffff80002a7b8a70,3,ffff80002a7fd938,0,ffff80002a7fd9e0) at dofilewritev+0x4fc sys/kern/sys_generic.c:398
sys_write(ffff80002a7b8a70,ffff80002a7fda90,ffff80002a7fd9e0) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff80002a7fda90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7fda90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7dd619e8d6f0, count: 250
End of stack trace.

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