panic: Most recently used by tty

cpuid = 0
time = 1557532438
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0021204220
vpanic() at vpanic+0x1e0/frame 0xfffffe0021204280
panic() at panic+0x43/frame 0xfffffe00212042e0
mtrash_ctor() at mtrash_ctor+0xed/frame 0xfffffe0021204320
uma_zalloc_arg() at uma_zalloc_arg+0x1036/frame 0xfffffe00212043d0
malloc() at malloc+0xe1/frame 0xfffffe0021204440
elf64_load_file() at elf64_load_file+0x6d/frame 0xfffffe00212044b0
exec_elf64_imgact() at exec_elf64_imgact+0x1aa2/frame 0xfffffe00212045b0
kern_execve() at kern_execve+0x7d8/frame 0xfffffe0021204900
sys_execve() at sys_execve+0x79/frame 0xfffffe0021204980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0021204ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0021204ab0
--- syscall (59, FreeBSD ELF64, sys_execve), rip = 0x8003ed3ca, rsp = 0x7fffffffce38, rbp = 0x7fffffffcf80 ---
KDB: enter: panic
[ thread pid 787 tid 100094 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why