panic: Most recently used by tty

cpuid = 0
time = 1557530580
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00213bc220
vpanic() at vpanic+0x1e0/frame 0xfffffe00213bc280
panic() at panic+0x43/frame 0xfffffe00213bc2e0
mtrash_ctor() at mtrash_ctor+0xed/frame 0xfffffe00213bc320
uma_zalloc_arg() at uma_zalloc_arg+0x1036/frame 0xfffffe00213bc3d0
malloc() at malloc+0xe1/frame 0xfffffe00213bc440
elf64_load_file() at elf64_load_file+0x6d/frame 0xfffffe00213bc4b0
exec_elf64_imgact() at exec_elf64_imgact+0x1aa2/frame 0xfffffe00213bc5b0
kern_execve() at kern_execve+0x7d8/frame 0xfffffe00213bc900
sys_execve() at sys_execve+0x79/frame 0xfffffe00213bc980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00213bcab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00213bcab0
--- syscall (59, FreeBSD ELF64, sys_execve), rip = 0x80038f3ca, rsp = 0x7fffffffdc58, rbp = 0x7fffffffe1b0 ---
KDB: enter: panic
[ thread pid 1592 tid 101147 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why