** Also affects: xorg-server via
   https://bugs.freedesktop.org/show_bug.cgi?id=102474
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1713981

Title:
  Xwayland segfaults when using kvm (since 2:1.19.3-1ubuntu4)

Status in X.Org X server:
  Unknown
Status in xorg-server package in Ubuntu:
  New

Bug description:
  Using GNOME/wayland in artful, I get that Xwayland/shell segfault when
  using kvm

  Thread 1 "Xwayland" received signal SIGSEGV, Segmentation fault.
  0x00000092f4790b6e in zwp_pointer_constraints_v1_lock_pointer (lifetime=2, 
region=0x0, pointer=<optimized out>, surface=<optimized out>, 
zwp_pointer_constraints_v1=0x92f72d8060)
      at ./pointer-constraints-unstable-v1-client-protocol.h:347
  347   ./pointer-constraints-unstable-v1-client-protocol.h: Aucun fichier ou 
dossier de ce type.
  #0  0x00000092f4790b6e in zwp_pointer_constraints_v1_lock_pointer 
(lifetime=2, region=0x0, pointer=<optimized out>, surface=<optimized out>, 
      zwp_pointer_constraints_v1=0x92f72d8060) at 
./pointer-constraints-unstable-v1-client-protocol.h:347
  #1  xwl_pointer_warp_emulator_lock (warp_emulator=0x92f7951ab0) at 
../../../../../hw/xwayland/xwayland-input.c:2590
  #2  0x00000092f47930f8 in xwl_seat_maybe_lock_on_hidden_cursor 
(xwl_seat=xwl_seat@entry=0x92f72d7dd0) at 
../../../../../hw/xwayland/xwayland-input.c:2762
  #3  0x00000092f4794660 in xwl_seat_maybe_lock_on_hidden_cursor 
(xwl_seat=0x92f72d7dd0) at ../../../../../hw/xwayland/xwayland-input.c:2823
  #4  xwl_seat_confine_pointer (xwl_seat=0x92f72d7dd0, xwl_window=0x92f7464630) 
at ../../../../../hw/xwayland/xwayland-input.c:2814
  #5  0x00000092f48d60cf in ActivatePointerGrab (mouse=0x92f724e890, 
grab=0x92f797b910, time=..., autoGrab=<optimized out>) at 
../../../../dix/events.c:1531
  #6  0x00000092f48d0db4 in GrabDevice (client=client@entry=0x92f769b470, 
dev=dev@entry=0x92f724e890, pointer_mode=1, keyboard_mode=1, 
grabWindow=<optimized out>, 
      ownerEvents=<optimized out>, ctime=0, mask=0x7ffcba605420, grabtype=1, 
curs=0, confineToWin=31457299, status=0x7ffcba60541f "") at 
../../../../dix/events.c:5120
  #7  0x00000092f48d3a1a in ProcGrabPointer (client=0x92f769b470) at 
../../../../dix/events.c:4908
  #8  0x00000092f48c5e58 in Dispatch () at ../../../../dix/dispatch.c:479
  #9  0x00000092f48c9e80 in dix_main (argc=10, argv=0x7ffcba605628, 
envp=<optimized out>) at ../../../../dix/main.c:287
  #10 0x00007f6be880b421 in __libc_start_main (main=0x92f478ec50 <main>, 
argc=10, argv=0x7ffcba605628, init=<optimized out>, fini=<optimized out>, 
rtld_fini=<optimized out>, 
      stack_end=0x7ffcba605618) at ../csu/libc-start.c:291
  #11 0x00000092f478ec8a in _start ()

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