Program received signal SIGSEGV, Segmentation fault.
0x40000000002f2dc0 in AllocatePicturePrivate (pScreen=<value optimized out>, 
    index2=0, amount=0) at picture.c:78
78          if (index2 >= ps->PicturePrivateLen)
(gdb) p index2
$1 = 0
(gdb) p ps
$2 = (PictureScreenPtr) 0x51
(gdb) up
#1  0x40000000002d3810 in miInitializeCompositeWrapper (
    pScreen=0x60000000001bc720) at cw.c:641
641         if (!AllocatePicturePrivate(pScreen, cwPictureIndex, 0))
(gdb) p pScreen
$4 = (ScreenPtr) 0x60000000001bc720
(gdb) p $.devPrivates
$6 = (DevUnion *) 0x60000000001bbd20
(gdb) p PictureScreenPrivateIndex
$7 = -1