.
Thread 1 (process 6631):
#0  0x00007f00c956a6ec in _int_malloc () from /lib/libc.so.6
#1  0x00007f00c956ba24 in _int_realloc () from /lib/libc.so.6
#2  0x00007f00c956cabe in realloc () from /lib/libc.so.6
#3  0x00007f00cb51b706 in miSubtractNonO1 (pReg=0x10a14b0, r=0x45f9278, rEnd=0x45f9280, y1=1043, y2=1050)
    at ../../src/Region.c:1387
	pNextRect = (BoxPtr) 0x41
#4  0x00007f00cb51c378 in miRegionOp (newReg=0x10a14b0, reg1=<value optimized out>, reg2=<value optimized out>, 
    overlapFunc=0x7f00cb51b770 <miSubtractO>, nonOverlap1Func=0x7f00cb51b6a0 <miSubtractNonO1>, nonOverlap2Func=0)
    at ../../src/Region.c:1086
	r1 = (BoxPtr) 0x45f9278
	r2 = (BoxPtr) 0x3317e58
	r1End = (BoxPtr) 0x45f9280
	r2End = (BoxPtr) 0x1
	ybot = <value optimized out>
	ytop = <value optimized out>
	oldRects = (BoxPtr) 0x45f9260
	prevBand = 3
	curBand = 5
	r1BandEnd = (BoxPtr) 0x45f9280
	r2BandEnd = <value optimized out>
	top = <value optimized out>
	bot = <value optimized out>
#5  0x00007f00cb51c6e7 in XSubtractRegion (regM=<value optimized out>, regS=<value optimized out>, regD=0x10a14b0)
    at ../../src/Region.c:1580
No locals.
#6  0x0000000000427c48 in paintOutputRegion (screen=0xee5390, transform=0x7fffd3c09ea0, region=0xee5408, 
    output=<value optimized out>, mask=14) at ../../src/paint.c:337
	w = (CompWindow *) 0x28c0720
	c = <value optimized out>
	count = 14
	windowMask = 1
	i = <value optimized out>
	fullscreenWindow = (CompWindow *) 0x0
	walk = {fini = 0, priv = {ptr = 0xe, val = 14, uval = 14, fptr = 0xe}, first = 0x412f60 <walkFirst>, 
  last = 0x412f70 <walkLast>, next = 0x412f80 <walkNext>, prev = 0x412f90 <walkPrev>}
	status = <value optimized out>
	withOffset = <value optimized out>
	vTransform = {m = {3.64466182e-20, 0, 0.000595238118, 0, -0, -0.000952380942, -0, -0, -1, 0, 6.12303177e-17, 0, -0.5, 
    0.5, -0.866025448, 1}}
	offX = 1680
	offY = 0
	clip = <value optimized out>
	tmpRegion = (Region) 0x10a14b0
#7  0x00000000004286bb in paintTransformedOutput (screen=0xee5390, sAttrib=0x7fffd3c0a1b0, transform=<value optimized out>, 
    region=0xee5408, output=0xeecd70, mask=14) at ../../src/paint.c:494
	sTransform = {m = {3.64466182e-20, 0, 0.000595238118, 0, -0, -0.000952380942, -0, -0, -1, 0, 6.12303177e-17, 0, -0.5, 
    0.5, -1.86602545, 1}}
#8  0x00007f00bd3bcfdd in ?? ()
#9  0x0000000024f48b3e in ?? ()
#10 0xbf800000bf80419a in ?? ()
#11 0x3fddb3d700000000 in ?? ()
#12 0x0000000000000000 in ?? ()