.
Thread 5 (Thread 0x7fca6746c900 (LWP 31621)):
#0  0x00007fca6587fbf9 in __GI___poll (fds=0x55ef02963e40, nfds=2, timeout=4409) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fca6604b2c9 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fca6604b662 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x000055ef013f6a53 in main ()
.
Thread 4 (Thread 0x7fca634d0700 (LWP 31622)):
#0  0x00007fca6587fbf9 in __GI___poll (fds=0x55ef0290df70, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fca6604b2c9 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fca6604b3dc in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fca6604b421 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fca66072d15 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fca65b636db in start_thread (arg=0x7fca634d0700) at pthread_create.c:463
        pd = 0x7fca634d0700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140507226113792, -7024774357241876078, 140507226111488, 0, 94485028455504, 140726886378944, 6995843294279446930, 6995840216671400338}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#6  0x00007fca6588c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 3 (Thread 0x7fca62ccf700 (LWP 31623)):
#0  0x00007fca6587fbf9 in __GI___poll (fds=0x55ef0291d470, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fca6604b2c9 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fca6604b662 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fca66637dc6 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fca66072d15 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fca65b636db in start_thread (arg=0x7fca62ccf700) at pthread_create.c:463
        pd = 0x7fca62ccf700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140507217721088, -7024774357241876078, 140507217718784, 0, 94485028455664, 140726886378896, 6995842195304690066, 6995840216671400338}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#6  0x00007fca6588c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 2 (Thread 0x7fca50a27700 (LWP 14240)):
#0  0x00007fca65886839 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fca66090e3a in g_cond_wait_until () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fca6601e4f1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fca6601eaac in g_async_queue_timeout_pop () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fca660737be in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fca66072d15 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fca65b636db in start_thread (arg=0x7fca50a27700) at pthread_create.c:463
        pd = 0x7fca50a27700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140506912945920, -7024774357241876078, 140506912943616, 0, 94485028457872, 140726886375504, 6995882099845837202, 6995840216671400338}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#7  0x00007fca6588c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 1 (Thread 0x7fca6181b700 (LWP 14244)):
#0  0x00007fca622a9ecc in utilBuildPackageId(pkgCache::VerIterator const&) () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#1  0x00007fca622b4e60 in AptIntf::emitPackage(pkgCache::VerIterator const&, PkInfoEnum) () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#2  0x00007fca622a530d in AcqPackageKitStatus::updateStatus(pkgAcquire::ItemDesc&, int) () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#3  0x00007fca6075bbc9 in pkgAcquire::Worker::RunMessages() () at /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0
#4  0x00007fca6075eebc in pkgAcquire::Worker::InFdReady() () at /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0
#5  0x00007fca6075fe14 in pkgAcquire::RunFdsSane(fd_set*, fd_set*) () at /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0
#6  0x00007fca6076590a in pkgAcquire::Run(int) () at /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0
#7  0x00007fca622c1034 in AptIntf::installPackages(unsigned long, bool) () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#8  0x00007fca622c228c in AptIntf::runTransaction(PkgList const&, PkgList const&, PkgList const&, bool, unsigned long, bool) () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#9  0x00007fca622c5afd in  () at /usr/lib/x86_64-linux-gnu/packagekit-backend/libpk_backend_aptcc.so
#10 0x000055ef01408a3a in  ()
#11 0x00007fca66072d15 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fca65b636db in start_thread (arg=0x7fca6181b700) at pthread_create.c:463
        pd = 0x7fca6181b700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140507196012288, -7024774357241876078, 140507196009984, 0, 140506969431600, 140726886380448, 6995849387227427218, 6995840216671400338}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#13 0x00007fca6588c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95