pacman -Syu lightdm crashes flinux child with an Unknown opcode error while updating user stuffs.

[HyperHCl]

The last lines of pacman goes like

groupadd: cannot lock /etc/group; try again later.
useradd: group 'lightdm' does not exist
passwd: user 'lightdm' does not exist

and how it crashed

(II) getrlimit(3, 0053fc0c)
(II) IP: 0x00401d90
(II) Handling page fault at address 10182910 (page 00010182)
(II) On demand block 0x00001018 loaded.
(II) IP: 0x00401d90
(II) Handling page fault at address 1013e6e0 (page 0001013e)
(II) On demand block 0x00001013 loaded.
(II) sys_uname(0053fca0)
(II) IP: 0x7288d9f5
(II) Handling page fault at address 101e99fc (page 000101e9)
(II) On demand block 0x0000101e loaded.
(II) IP: 0x00401d90
(II) Handling page fault at address 10175550 (page 00010175)
(II) On demand block 0x00001017 loaded.
(II) IP: 0x00401d90
(II) Handling page fault at address 100b1460 (page 000100b1)
(II) On demand block 0x0000100b loaded.
(EE) Unknown opcode.
(II) Application crashed, dumping debug information...
*** WINDOWS 7 INFO ***
问题签名:
  问题事件名称:   APPCRASH
  应用程序名:  flinux.exe
  应用程序版本:   0.0.0.0
  应用程序时间戳:    54ffc6b7
  故障模块名称:   flinux.exe
  故障模块版本:   0.0.0.0
  故障模块时间戳:    54ffc6b7
  异常代码: 80000003
  异常偏移: 00001fe2
  OS 版本:    6.1.7601.2.1.0.256.48
  区域设置 ID:  2052
  其他信息 1:   e8ad
  其他信息 2:   e8adce1c2b9e7be834b4063ac3c53863
  其他信息 3:   e8ad
  其他信息 4:   e8adce1c2b9e7be834b4063ac3c53863

plus full log of this pid: https://pastebin.anthonos.org/view/9d4e5ff8 By the way maybe I should start an issue to request changing ‘Crashed’ message to Fatal/FF/!! level and the debug to Error/EE level…

After crashing 2 processes, pacman went on and reported a command failed to execute correctly error.