[Wayland-bugs] [Bug 102474] segfault in zwp_pointer_constraints_v1_lock_pointer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102474

--- Comment #3 from Olivier Fourdan <fourdan at xfce.org> ---
I can reproduce a similar crash using qemu-kvm with SDL backend and alt-tabbing
between the qemu window and some ohter native window in gnome-shell:

Thread 1 "Xwayland" received signal SIGSEGV, Segmentation fault.
0x000000000042b77e in zwp_pointer_constraints_v1_lock_pointer (lifetime=2,
region=0x0, pointer=<optimized out>, surface=<optimized out>, 
    zwp_pointer_constraints_v1=0x1ef37d0) at
pointer-constraints-unstable-v1-client-protocol.h:347
347             id = wl_proxy_marshal_constructor((struct wl_proxy *)
zwp_pointer_constraints_v1,
(gdb) bt
#0  0x000000000042b77e in zwp_pointer_constraints_v1_lock_pointer (lifetime=2,
region=0x0, pointer=<optimized out>, surface=<optimized out>, 
    zwp_pointer_constraints_v1=0x1ef37d0) at
pointer-constraints-unstable-v1-client-protocol.h:347
#1  xwl_pointer_warp_emulator_lock (warp_emulator=0x2c26db0) at
xwayland-input.c:2584
#2  0x000000000042d998 in xwl_seat_maybe_lock_on_hidden_cursor
(xwl_seat=xwl_seat at entry=0x29142f0) at xwayland-input.c:2756
#3  0x000000000042ef15 in xwl_seat_maybe_lock_on_hidden_cursor
(xwl_seat=0x29142f0) at xwayland-input.c:2765
#4  xwl_seat_cursor_visibility_changed (xwl_seat=xwl_seat at entry=0x29142f0) at
xwayland-input.c:2768
#5  0x000000000042fa68 in xwl_set_cursor (device=<optimized out>,
screen=<optimized out>, cursor=<optimized out>, x=<optimized out>, y=<optimized
out>)
    at xwayland-cursor.c:245
#6  0x00000000004c4b8a in miPointerUpdateSprite (pDev=0x28e6fa0) at
mipointer.c:468
#7  0x00000000004c4dda in miPointerDisplayCursor (pDev=0x28e6fa0,
pScreen=0x1ee6740, pCursor=0x2b988a0) at mipointer.c:206
#8  0x00000000004b2250 in CursorDisplayCursor (pDev=0x28e6fa0,
pScreen=0x1ee6740, pCursor=0x2b988a0) at cursor.c:150
#9  0x000000000052e44f in AnimCurDisplayCursor (pDev=0x28e6fa0,
pScreen=0x1ee6740, pCursor=0x2b988a0) at animcur.c:220
#10 0x000000000044cc4b in ChangeToCursor (pDev=0x28e6fa0, cursor=0x2b988a0) at
events.c:936
#11 0x0000000000453d3e in ActivatePointerGrab (mouse=0x28e6fa0, grab=0x2d1d7f0,
time=..., autoGrab=<optimized out>) at events.c:1542
#12 0x000000000044ecd1 in GrabDevice (client=client at entry=0x2ae5720,
dev=dev at entry=0x28e6fa0, pointer_mode=1, keyboard_mode=1, grabWindow=<optimized
out>, 
    ownerEvents=<optimized out>, ctime=0, mask=0x7ffce3a623f0, grabtype=1,
curs=0, confineToWin=4194314, status=0x7ffce3a623ef "") at events.c:5120
#13 0x000000000045180a in ProcGrabPointer (client=0x2ae5720) at events.c:4908
#14 0x0000000000443ffa in Dispatch () at dispatch.c:478
#15 0x0000000000447f08 in dix_main (argc=10, argv=0x7ffce3a625e8,
envp=<optimized out>) at main.c:276
#16 0x00007efc0168250a in __libc_start_main () from /lib64/libc.so.6
#17 0x000000000042979a in _start ()

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