I'm attaching another different gdb backtrace. I hope it helps.
Continuing.
Program received signal SIGBUS, Bus error.
_int_malloc (av=av@entry=0x7fc7110edc00 <main_arena>, bytes=bytes@entry=216) at
malloc.c:3483
3483 malloc.c: No such file or directory.
#0 _int_malloc (av=av@entry=0x7fc7110edc00 <main_arena>,
bytes=bytes@entry=216) at malloc.c:3483
iters = 0
nb = <optimized out>
idx = 14
bin = <optimized out>
victim = 0x559e5a5743d0
size = 1744
victim_index = <optimized out>
remainder = <optimized out>
remainder_size = <optimized out>
block = <optimized out>
bit = <optimized out>
map = <optimized out>
fwd = <optimized out>
bck = 0xff232525ff232525
errstr = 0x0
__func__ = "_int_malloc"
#1 0x00007fc710dc98ee in __GI___libc_malloc (bytes=216) at malloc.c:2895
ar_ptr = 0x7fc7110edc00 <main_arena>
victim = <optimized out>
hook = <optimized out>
__func__ = "__libc_malloc"
#2 0x00007fc711eb07bb in ?? () from /usr/lib/x86_64-linux-gnu/libpixman-1.so.0
No symbol table info available.
#3 0x00007fc711eb4722 in pixman_region_init_rects () from
/usr/lib/x86_64-linux-gnu/libpixman-1.so.0
No symbol table info available.
#4 0x00007fc70c758575 in sna_composite_rectangles (op=<optimized out>,
dst=0x559e5a3970f0, color=0x559e5a42e744, num_rects=25, rects=0x559e5a42e74c)
at ../../../src/sna/sna_composite.c:923
pixmap = <optimized out>
bo = <optimized out>
damage = 0x0
region = {extents = {x1 = 0, y1 = 0, x2 = 0, y2 = 0}, data =
0x559e5827bc20 <RegionEmptyData>}
stack_boxes = {{x1 = 34, y1 = 0, x2 = 35, y2 = 36}, {x1 = 34, y1 = 54,
x2 = 35, y2 = 74}, {x1 = 66, y1 = 0, x2 = 67, y2 = 36}, {x1 = 66,
y1 = 54, x2 = 67, y2 = 74}, {x1 = 98, y1 = 0, x2 = 99, y2 = 36},
{x1 = 98, y1 = 54, x2 = 99, y2 = 74}, {x1 = 130, y1 = 0, x2 = 131,
y2 = 36}, {x1 = 130, y1 = 54, x2 = 131, y2 = 74}, {x1 = 162, y1 =
0, x2 = 163, y2 = 36}, {x1 = 162, y1 = 54, x2 = 163, y2 = 74}, {
x1 = 194, y1 = 0, x2 = 195, y2 = 36}, {x1 = 194, y1 = 54, x2 = 195,
y2 = 74}, {x1 = 226, y1 = 0, x2 = 227, y2 = 36}, {x1 = 226, y1 = 54,
x2 = 227, y2 = 74}, {x1 = 258, y1 = 0, x2 = 259, y2 = 36}, {x1 =
258, y1 = 54, x2 = 259, y2 = 74}, {x1 = 290, y1 = 0, x2 = 291,
y2 = 36}, {x1 = 290, y1 = 54, x2 = 291, y2 = 74}, {x1 = 322, y1 =
0, x2 = 323, y2 = 36}, {x1 = 322, y1 = 54, x2 = 323, y2 = 74}, {
x1 = 354, y1 = 0, x2 = 355, y2 = 36}, {x1 = 354, y1 = 54, x2 = 355,
y2 = 74}, {x1 = 386, y1 = 18, x2 = 387, y2 = 36}, {x1 = 386,
y1 = 54, x2 = 387, y2 = 74}, {x1 = 424, y1 = 54, x2 = 425, y2 =
72}, {x1 = 0, y1 = 27, x2 = 1680, y2 = 1023}, {x1 = 29048, y1 = 23102,
x2 = 21918, y2 = 0}, {x1 = -18688, y1 = 176, x2 = -7851, y2 =
28565}, {x1 = 141, y1 = 0, x2 = 0, y2 = 0}, {x1 = 28960, y1 = 23102,
x2 = 21918, y2 = 0}, {x1 = 28976, y1 = 23102, x2 = 21918, y2 = 0},
{x1 = 29048, y1 = 23102, x2 = 21918, y2 = 0}, {x1 = 16, y1 = 0,
x2 = 0, y2 = 0}, {x1 = -680, y1 = 22515, x2 = 21918, y2 = 0}, {x1 =
-13696, y1 = 22991, x2 = 21918, y2 = 0}, {x1 = -17472, y1 = 22991,
x2 = 21918, y2 = 0}, {x1 = 7600, y1 = 22568, x2 = 21918, y2 = 0},
{x1 = -21036, y1 = 22504, x2 = 21918, y2 = 0}, {x1 = 7600, y1 = 22568,
x2 = 21918, y2 = 0}, {x1 = -17588, y1 = -8546, x2 = 32765, y2 = 0},
{x1 = -17376, y1 = -8546, x2 = 32765, y2 = 0}, {x1 = 81, y1 = 352,
x2 = 0, y2 = 0}, {x1 = 2048, y1 = 23100, x2 = 21918, y2 = 0}, {x1 =
-25314, y1 = 22515, x2 = 21918, y2 = 0}, {x1 = 2048, y1 = 23100,
x2 = 21918, y2 = 0}, {x1 = 81, y1 = 352, x2 = 10, y2 = 0}, {x1 =
28912, y1 = 23097, x2 = 21918, y2 = 0}, {x1 = 0, y1 = 0, x2 = 21918,
y2 = 0}, {x1 = 0, y1 = 0, x2 = 0, y2 = 0}, {x1 = 2, y1 = 0, x2 = 0,
y2 = 0}, {x1 = 48, y1 = 0, x2 = 21918, y2 = 0}, {x1 = -17480,
y1 = -8546, x2 = 32765, y2 = 0}, {x1 = -17552, y1 = -8546, x2 =
32765, y2 = 0}, {x1 = -18688, y1 = 176, x2 = -7851, y2 = 28565}, {
x1 = 0, y1 = 0, x2 = 1680, y2 = 986}, {x1 = 2048, y1 = 23100, x2 =
21918, y2 = 0}, {x1 = 81, y1 = 352, x2 = 0, y2 = 0}, {x1 = 10,
y1 = 0, x2 = 0, y2 = 0}, {x1 = 28912, y1 = 23097, x2 = 21918, y2 =
0}, {x1 = 0, y1 = 0, x2 = 0, y2 = 0}, {x1 = 10, y1 = 0, x2 = 0,
y2 = 0}, {x1 = -18942, y1 = 22506, x2 = 21918, y2 = 0}, {x1 = 0, y1
= 0, x2 = 0, y2 = 0}, {x1 = 1865, y1 = 22518, x2 = 21918, y2 = 0}}
boxes = 0x7ffdde9eb9c0
b = <optimized out>
dst_x = <optimized out>
dst_y = <optimized out>
i = <optimized out>
num_boxes = 25
hint = <optimized out>
#5 0x0000559e57f650f2 in ProcRenderFillRectangles (client=0x559e5a3c0800) at
../../render/render.c:1427
pDst = 0x559e5a3970f0
things = <optimized out>
stuff = <optimized out>
#6 0x0000559e57e85a3f in Dispatch () at ../../dix/dispatch.c:430
clientReady = 0x559e5a1a4000
result = <optimized out>
client = 0x559e5a3c0800
nready = 0
icheck = 0x559e58285250 <checkForInput>
start_tick = 119215
#7 0x0000559e57e89a53 in dix_main (argc=14, argv=0x7ffdde9ebdf8,
envp=<optimized out>) at ../../dix/main.c:300
i = <optimized out>
alwaysCheckForInput = {0, 1}
#8 0x00007fc710d6f870 in __libc_start_main (main=0x559e57e73db0 <main>,
argc=14, argv=0x7ffdde9ebdf8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffdde9ebde8) at libc-start.c:291
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 9213018653058928955,
94138567966144, 140728338398704, 0, 0, 3106398956737794363,
3128235873826509115}, mask_was_saved = 0}}, priv = {pad = {0x0,
0x0, 0x559e57ff86f0 <__libc_csu_init>, 0x7ffdde9ebdf8}, data = {
prev = 0x0, cleanup = 0x0, canceltype = 1476364016}}}
not_first_call = <optimized out>
#9 0x0000559e57e73de9 in _start ()
No symbol table info available.
