BTW, errors.ubuntu.com's idea of "StacktraceAddressSignature" looks like
it could be subject to collisions. In the cases mentioned in comment
#13, they're only grouped together because they all have crashes that
are identical to depth 4:
#0 __libc_do_syscall () at
../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
No locals.
#1 0xb6808e5e in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
_a1 = 0
_a3tmp = 6
_a1tmp = 0
_a3 = 6
_nametmp = 268
_a2tmp = 2338
_a2 = 2338
_name = 268
_sys_result = <optimized out>
pd = 0xae2ff3d0
pid = 0
selftid = 2338
#2 0xb6809b4e in __GI_abort () at abort.c:89
save_stage = 2
act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0},
sa_mask = {__val = {2922372744, 19, 2922379408, 3061935093, 0, 28, 2922374040,
2923454184, 0, 3061940382, 3061940382, 3061940382, 3062538872, 0, 2922373148,
3010790933, 37, 128, 1, 0, 1, 0, 2922372840, 3010933547, 144, 2923450104, 0, 0,
0, 0, 0, 0}}, sa_flags = 0, sa_restorer = 0xae2fdff0}
sigs = {__val = {32, 0 <repeats 31 times>}}
#3 0xb68323f8 in __libc_message (do_abort=<optimized out>, fmt=0xb68b0518 "***
Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
ap = {__ap = 0xae2fe03c}
fd = 2
on_2 = <optimized out>
list = <optimized out>
nlist = <optimized out>
cp = <optimized out>
written = <optimized out>
** Changed in: unity-system-compositor (Ubuntu)
Status: Invalid => Confirmed
** Changed in: unity-system-compositor (Ubuntu)
Importance: Undecided => High
** Changed in: unity-system-compositor
Status: Invalid => Confirmed
** Changed in: unity-system-compositor
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1376324
Title:
/usr/sbin/unity-system-compositor:*** Error in `unity-system-
compositor': free(): invalid pointer: ADDR ***
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