Well apparently this is not completely fixed :/
It still fails with either:
Stack trace of thread 5826:
#0 0x00007fcf7de1c5e7 __GI___getpriority (libc.so.6)
#1 0x00007fcf7d9b8e18 _pt_root (libnspr4.so)
#2 0x00007fcf7def4fa3 start_thread (libpthread.so.0)
#3 0x00007fcf7de2588f __clone (libc.so.6)
Stack trace of thread 5801:
#0 0x00007fcf7defe1dc __lll_lock_wait (libpthread.so.0)
#1 0x00007fcf7def7704 __GI___pthread_mutex_lock
(libpthread.so.0)
#2 0x00005617fe63f703 qemu_mutex_lock_impl
(qemu-system-x86_64)
#3 0x00005617fe23b6ee qemu_mutex_lock_iothread_impl
(qemu-system-x86_64)
#4 0x00005617fe65160e call_rcu_thread (qemu-system-x86_64)
#5 0x00005617fe63f5ba qemu_thread_start
(qemu-system-x86_64)
#6 0x00007fcf7def4fa3 start_thread (libpthread.so.0)
#7 0x00007fcf7de2588f __clone (libc.so.6)
Stack trace of thread 5777:
#0 0x00007fcf7de25881 __clone (libc.so.6)
#1 0x0000000000000000 n/a (n/a)
Or
Stack trace of thread 8784:
#0 0x00007f60dd9695e7 __GI___getpriority (libc.so.6)
#1 0x00007f60dd505e18 _pt_root (libnspr4.so)
#2 0x00007f60dda41fa3 start_thread (libpthread.so.0)
#3 0x00007f60dd97288f __clone (libc.so.6)
Stack trace of thread 8779:
#0 0x00007f60dda47fac futex_wait_cancelable
(libpthread.so.0)
#1 0x00005581558d7c3b qemu_cond_wait_impl
(qemu-system-x86_64)
#2 0x00005581554d1fc7 qemu_wait_io_event
(qemu-system-x86_64)
#3 0x00005581554d3888 qemu_kvm_cpu_thread_fn
(qemu-system-x86_64)
#4 0x00005581558d75ba qemu_thread_start
(qemu-system-x86_64)
#5 0x00007f60dda41fa3 start_thread (libpthread.so.0)
#6 0x00007f60dd97288f __clone (libc.so.6)
Stack trace of thread 8735:
#0 0x00007f60dda49466 pthread_sigmask (libpthread.so.0)
#1 0x00005581558d82b2 qemu_thread_create
(qemu-system-x86_64)
#2 0x000055815576ff08 emulated_realize
(qemu-system-x86_64)
#3 0x000055815576ccba ccid_card_realize
(qemu-system-x86_64)
#4 0x000055815567e70c device_set_realized
(qemu-system-x86_64)
#5 0x00005581557ee497 property_set_bool
(qemu-system-x86_64)
#6 0x00005581557f28bf object_property_set_qobject
(qemu-system-x86_64)
#7 0x00005581557f0375 object_property_set_bool
(qemu-system-x86_64)
#8 0x00005581555f6bcc qdev_device_add (qemu-system-x86_64)
#9 0x00005581555f90ef device_init_func
(qemu-system-x86_64)
#10 0x00005581558e5faa qemu_opts_foreach
(qemu-system-x86_64)
#11 0x000055815548e1eb main (qemu-system-x86_64)
#12 0x00007f60dd89d09b __libc_start_main (libc.so.6)
#13 0x0000558155491aba _start (qemu-system-x86_64)
Stack trace of thread 8778:
#0 0x00007f60dda4a9c2 futex_abstimed_wait_cancelable
(libpthread.so.0)
#1 0x00007f60dda4aad3 __new_sem_wait_slow
(libpthread.so.0)
#2 0x00005581558d7f2f qemu_sem_timedwait
(qemu-system-x86_64)
#3 0x00005581558d29f4 worker_thread (qemu-system-x86_64)
#4 0x00005581558d75ba qemu_thread_start
(qemu-system-x86_64)
#5 0x00007f60dda41fa3 start_thread (libpthread.so.0)
#6 0x00007f60dd97288f __clone (libc.so.6)
Stack trace of thread 8767:
#0 0x00007f60dda4b1dc __lll_lock_wait (libpthread.so.0)
#1 0x00007f60dda44704 __GI___pthread_mutex_lock
(libpthread.so.0)
#2 0x00005581558d7703 qemu_mutex_lock_impl
(qemu-system-x86_64)
#3 0x00005581554d36ee qemu_mutex_lock_iothread_impl
(qemu-system-x86_64)
#4 0x00005581558e960e call_rcu_thread (qemu-system-x86_64)
#5 0x00005581558d75ba qemu_thread_start
(qemu-system-x86_64)
#6 0x00007f60dda41fa3 start_thread (libpthread.so.0)
#7 0x00007f60dd97288f __clone (libc.so.6)
Stack trace of thread 8785:
#0 0x00007f60dd972881 __clone (libc.so.6)
#1 0x0000000000000000 n/a (n/a)