Just got another unity8 crash and this time system-settings maxing the cpu. Here is the thread dump. It appears it's in a tight loop spawing and exiting threads: (gdb) bt #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) t a a bt Thread 15 (Thread 0xb2297450 (LWP 4318)): Cannot access memory at address 0x0 #0 0xb442c840 in ?? () Cannot access memory at address 0x0 #1 0xb444029c in ?? () Cannot access memory at address 0x0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 14 (Thread 0xb2507b40 (LWP 4319)): #0 0xb5e11b76 in ?? () from /lib/arm-linux-gnueabihf/librt.so.1 #1 0xb5e11be2 in ?? () from /lib/arm-linux-gnueabihf/librt.so.1 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 13 (Thread 0xb18ff450 (LWP 4320)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 Cannot access memory at address 0x3000000 #2 0xb235e0a8 in ?? () Cannot access memory at address 0x3000000 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 12 (Thread 0xb10ff450 (LWP 4321)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 Cannot access memory at address 0x3000000 #2 0xb235e0a8 in ?? () Cannot access memory at address 0x3000000 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 11 (Thread 0xb08ff450 (LWP 4322)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 10 (Thread 0xae9bb450 (LWP 4328)): #0 0xb6242712 in epoll_wait () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb3d20422 in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #2 0xb3d222be in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #3 0xb3d2268e in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 ---Type to continue, or q to quit--- #4 0xb3d0b92c in core::dbus::Bus::run() () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #5 0xb634f360 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #6 0xb6191f98 in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0 #7 0xb624222c in ?? () from /lib/arm-linux-gnueabihf/libc.so.6 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 9 (Thread 0xadf2e450 (LWP 4332)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 8 (Thread 0xad433450 (LWP 4335)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 7 (Thread 0xacc33450 (LWP 4336)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 6 (Thread 0xabd88450 (LWP 4337)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 5 (Thread 0xab25d450 (LWP 4342)): #0 0xb6231816 in sched_yield () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb3bd6582 in ?? () from /usr/lib/arm-linux-gnueabihf/libmircommon.so.2 #2 0xb634f360 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #3 0xb6191f98 in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0 #4 0xb624222c in ?? () from /lib/arm-linux-gnueabihf/libc.so.6 Backtrace stopped: previous frame identical to this frame (corrupt stack?) ---Type to continue, or q to quit--- Thread 4 (Thread 0xaaa1d450 (LWP 4343)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 #2 0xb6bbc05c in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 #3 0xb670318c in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 3 (Thread 0xaa21d450 (LWP 4344)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 Cannot access memory at address 0x3000000 #2 0xb235e0a8 in ?? () Cannot access memory at address 0x3000000 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 2 (Thread 0xa99b7450 (LWP 4406)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 1 (Thread 0xb6f03000 (LWP 4304)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) continue Continuing. Cannot access memory at address 0x0 [New Thread 0xa85a7450 (LWP 8483)] [Thread 0xa85a7450 (LWP 8483) exited] [New Thread 0xa85a7450 (LWP 8488)] [Thread 0xa85a7450 (LWP 8488) exited] [New Thread 0xa85a7450 (LWP 8501)] [Thread 0xa85a7450 (LWP 8501) exited] [New Thread 0xa85a7450 (LWP 8506)] [Thread 0xa85a7450 (LWP 8506) exited] [New Thread 0xa85a7450 (LWP 8511)] [Thread 0xa85a7450 (LWP 8511) exited] [New Thread 0xa85a7450 (LWP 8515)] [Thread 0xa85a7450 (LWP 8515) exited] [New Thread 0xa85a7450 (LWP 8518)] [Thread 0xa85a7450 (LWP 8518) exited] [New Thread 0xa85a7450 (LWP 8522)] [Thread 0xa85a7450 (LWP 8522) exited] [New Thread 0xa85a7450 (LWP 8526)] [Thread 0xa85a7450 (LWP 8526) exited] [New Thread 0xa85a7450 (LWP 8530)] [Thread 0xa85a7450 (LWP 8530) exited] [New Thread 0xa85a7450 (LWP 8534)] [Thread 0xa85a7450 (LWP 8534) exited] [New Thread 0xa85a7450 (LWP 8540)] [Thread 0xa85a7450 (LWP 8540) exited] [New Thread 0xa85a7450 (LWP 8544)] [Thread 0xa85a7450 (LWP 8544) exited] [New Thread 0xa85a7450 (LWP 8548)] [Thread 0xa85a7450 (LWP 8548) exited] [New Thread 0xa85a7450 (LWP 8552)] [Thread 0xa85a7450 (LWP 8552) exited] [New Thread 0xa85a7450 (LWP 8556)] [Thread 0xa85a7450 (LWP 8556) exited] [New Thread 0xa85a7450 (LWP 8560)] [Thread 0xa85a7450 (LWP 8560) exited] [New Thread 0xa85a7450 (LWP 8564)] [Thread 0xa85a7450 (LWP 8564) exited] [New Thread 0xa85a7450 (LWP 8568)] [Thread 0xa85a7450 (LWP 8568) exited] [New Thread 0xa85a7450 (LWP 8572)] [Thread 0xa85a7450 (LWP 8572) exited] [New Thread 0xa85a7450 (LWP 8576)] [Thread 0xa85a7450 (LWP 8576) exited] [New Thread 0xa85a7450 (LWP 8584)] [Thread 0xa85a7450 (LWP 8584) exited] [New Thread 0xa85a7450 (LWP 8588)] [Thread 0xa85a7450 (LWP 8588) exited] [New Thread 0xa85a7450 (LWP 8592)] [Thread 0xa85a7450 (LWP 8592) exited] [New Thread 0xa85a7450 (LWP 8596)] [Thread 0xa85a7450 (LWP 8596) exited] [New Thread 0xa85a7450 (LWP 8600)] [Thread 0xa85a7450 (LWP 8600) exited] [New Thread 0xa85a7450 (LWP 8604)] [Thread 0xa85a7450 (LWP 8604) exited] [New Thread 0xa85a7450 (LWP 8608)] [Thread 0xa85a7450 (LWP 8608) exited] [New Thread 0xa85a7450 (LWP 8612)] [Thread 0xa85a7450 (LWP 8612) exited] [New Thread 0xa85a7450 (LWP 8616)] [Thread 0xa85a7450 (LWP 8616) exited] [New Thread 0xa85a7450 (LWP 8620)] [Thread 0xa85a7450 (LWP 8620) exited] [New Thread 0xa85a7450 (LWP 8624)] [Thread 0xa85a7450 (LWP 8624) exited] [New Thread 0xa85a7450 (LWP 8628)] [Thread 0xa85a7450 (LWP 8628) exited] [New Thread 0xa85a7450 (LWP 8632)] [Thread 0xa85a7450 (LWP 8632) exited] [New Thread 0xa85a7450 (LWP 8636)] [Thread 0xa85a7450 (LWP 8636) exited] [New Thread 0xa85a7450 (LWP 8640)] .... [goes on indefiinitely]