kernel panic at kern/src/ns/tree_file.c:880, from core 2: assertion failed: tree_file_is_dir(new_parent)
Stack Backtrace on Core 2:
#01 [<0xffffffffc200a42c>] in backtrace at src/kdebug.c:235
#02 [<0xffffffffc2009bc5>] in _panic at src/init.c:268
#03 [<0xffffffffc20441c3>] in tree_file_rename at src/ns/tree_file.c:880
#04 [<0xffffffffc2044357>] in tree_chan_rename at src/ns/tree_file.c:980
#05 [<0xffffffffc2033978>] in __namec_from at src/ns/chan.c:1331
#06 [<0xffffffffc2034383>] in namec at src/ns/chan.c:1560
#07 [<0xffffffffc203e371>] in sysrename at src/ns/sysfile.c:889
#08 [<0xffffffffc2056ca2>] in sys_rename at src/syscall.c:2391
#09 [<0xffffffffc2059ea9>] in syscall at src/syscall.c:2575
#10 [<0xffffffffc205aa58>] in run_local_syscall at src/syscall.c:2612
#11 [<0xffffffffc205af99>] in prep_syscalls at src/syscall.c:2632
#12 [<0xffffffffc20ac882>] in sysenter_callwrapper at arch/x86/trap.c:877
Unhandled user trap in vcore context from VC 0
HW TRAP frame (partial) at 0xffffffffc8e383a0 on core 3
  rax  0x000000005a5a4e80
  rbx  0x0000300000006e90
  rcx  0x0000000000000150
  rdx  0x000010000000a4c0
  rbp  0x0000300000006e80
  rsi  0x000010000000a5c0
  rdi  0x000000005a5a4f80
  r8   0x000000005a5a5a5a
  r9   0x000000005a5a4e80
  r10  0x0000000000000000
ROS(Core 2)>   r11  0x0000000000000200
  r12  0x0000000000410050
  r13  0x000010000000a4c0
  r14  0x0000000000000004
  r15  0x00007f7fffa01200
  trap 0x0000000e Page Fault
  gsbs 0x0000000000000000
  fsbs 0x0000000000000000
  err  0x--------00000006
  rip  0x000000000040fe36
  cs   0x------------0023
  flag 0x0000000000010202
  rsp  0x0000300000006d80
  ss   0x------------001b
err 0x6 (for PFs: User 4, Wr 2, Rd 1), aux 0x000000005a5a4f80
Addr 0x000000000040fe36 is in syz-executor at offset 0x000000000000fe36
VM Regions for proc 144
NR:                                     Range:       Prot,      Flags,               File,                Off
00: (0x0000000000400000 - 0x00000000004b6000): 0x00000005, 0x00000001, 0xffff800008502820, 0x0000000000000000
01: (0x00000000004b6000 - 0x00000000004b7000): 0x00000005, 0x00000002, 0xffff800008502820, 0x00000000000b6000
02: (0x00000000006b6000 - 0x00000000006b9000): 0x00000003, 0x00000002, 0xffff800008502820, 0x00000000000b6000
03: (0x00000000006b9000 - 0x00000000008e5000): 0x00000003, 0x00000002, 0x0000000000000000, 0x0000000000000000
04: (0x0000000020000000 - 0x0000000021000000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000
05: (0x0000100000000000 - 0x0000100000024000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000
06: (0x0000300000000000 - 0x0000300000001000): 0x00000003, 0x00000002, 0xffff800008502820, 0x0000000000000000
07: (0x0000300000001000 - 0x0000300000005000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000
08: (0x0000300000005000 - 0x0000300000007000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000
09: (0x0000300000007000 - 0x0000300000019000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000
10: (0x0000300000019000 - 0x000030000003d000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000
11: (0x00007f7fff8ff000 - 0x00007f7fff9ff000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000
Backtrace of user context on Core 3:
	Offsets only matter for shared libraries
#01 Addr 0x000000000040fe36 is in syz-executor at offset 0x000000000000fe36
#02 Addr 0x000000000041025e is in syz-executor at offset 0x000000000001025e
#03 Addr 0x000000000041580d is in syz-executor at offset 0x000000000001580d
#04 Addr 0x00000000004080fb is in syz-executor at offset 0x00000000000080fb
#05 Addr 0x0000000000414c60 is in syz-executor at offset 0x0000000000014c60
#06 Addr 0x000000000040862a is in syz-executor at offset 0x000000000000862a
#07 Addr 0x0000000000404019 is in syz-executor at offset 0x0000000000004019
#08 Addr 0x000000000041498c is in syz-executor at offset 0x000000000001498c
#09 Addr 0x0000000000414991 is in syz-executor at offset 0x0000000000014991