StacktraceTop: pthread_mutex_lock () from /lib/libpthread.so.0 px_proxy_factory_get_proxies (self=0xc41ae7f0, ffi_call_unix64 () ffi_call (cif=0x7fd3c3ffba20, _CallProc (pProc=<value optimized out>,
StacktraceTop: .so.0 factory_ get_proxies (self=0xc41ae7f0, ba20,
pthread_mutex_lock () from /lib/libpthread
px_proxy_
ffi_call_unix64 ()
ffi_call (cif=0x7fd3c3ff
_CallProc (pProc=<value optimized out>,