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 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1376324 Title: /usr/sbin/unity-system-compositor:*** Error in `unity-system- compositor': free(): invalid pointer: ADDR *** Status in Mir: Fix Released Status in Mir 0.8 series: Triaged Status in Unity System Compositor: Invalid Status in mir package in Ubuntu: Fix Released Status in unity-system-compositor package in Ubuntu: Invalid Status in mir package in Ubuntu RTM: Triaged Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding unity-system-compositor. This problem was most recently seen with version 0.0.5+14.10.20140917-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/bfb855ebc60f251bf495a2ffb24f2924c50bdbf8 contains more details. To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1376324/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp