(gdb) bt
#0  0x00007f71eb17e2d8 in do_futex_wait.constprop () from /lib64/libpthread.so.0
#1  0x00007f71eb17e384 in __new_sem_wait_slow.constprop.0 () from /lib64/libpthread.so.0
#2  0x00007f71eb38ccf9 in leave_npth () at npth.c:168
#3  0x00007f71eb38d45e in npth_pselect (nfd=nfd@entry=8, rfds=rfds@entry=0x7ffdaa7d6640, wfds=wfds@entry=0x0, efds=efds@entry=0x0, timeout=timeout@entry=0x7ffdaa7d6460, sigmask=<optimized out>) at npth.c:676
#4  0x000000000040b0b2 in handle_connections (listen_fd=listen_fd@entry=3, listen_fd_extra=listen_fd_extra@entry=4, listen_fd_browser=listen_fd_browser@entry=5, listen_fd_ssh=listen_fd_ssh@entry=6)
    at gpg-agent.c:2860
#5  0x0000000000408044 in main (argc=0, argv=0x7ffdaa7d6a40) at gpg-agent.c:1706
(gdb) bt full
#0  0x00007f71eb17e2d8 in do_futex_wait.constprop () from /lib64/libpthread.so.0
No symbol table info available.
#1  0x00007f71eb17e384 in __new_sem_wait_slow.constprop.0 () from /lib64/libpthread.so.0
No symbol table info available.
#2  0x00007f71eb38ccf9 in leave_npth () at npth.c:168
        res = <optimized out>
        save_errno = 22
#3  0x00007f71eb38d45e in npth_pselect (nfd=nfd@entry=8, rfds=rfds@entry=0x7ffdaa7d6640, wfds=wfds@entry=0x0, efds=efds@entry=0x0, timeout=timeout@entry=0x7ffdaa7d6460, sigmask=<optimized out>) at npth.c:676
        res = 0
#4  0x000000000040b0b2 in handle_connections (listen_fd=listen_fd@entry=3, listen_fd_extra=listen_fd_extra@entry=4, listen_fd_browser=listen_fd_browser@entry=5, listen_fd_ssh=listen_fd_ssh@entry=6)
    at gpg-agent.c:2860
        err = <optimized out>
        tattr = {__size = "\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000\020", '\000' <repeats 37 times>, __align = 0}
        paddr = {sun_family = 1, 
          sun_path = '\000' <repeats 14 times>, "\t\000\000\000\000\000\000\000\000;\031\036\241\023<*\000\000\000\000\000\000\000\000\000;\031\036\241\023<*\200Af\000\000\000\000\000\200Af\000\000\000\000\000\060f}\252\375\177\000\000\372\022D\000\000\000\000\000\002", '\000' <repeats 23 times>, "\375\\z\353q\177"}
        plen = 2
        fdset = {fds_bits = {248, 0 <repeats 15 times>}}
        read_fdset = {fds_bits = {0 <repeats 16 times>}}
        ret = <optimized out>
        fd = <optimized out>
        nfd = 7
        saved_errno = <optimized out>
        abstime = {tv_sec = 1484560292, tv_nsec = 604527291}
        curtime = {tv_sec = 1484560290, tv_nsec = 604526450}
        timeout = {tv_sec = 2, tv_nsec = 841}
        my_inotify_fd = 7
        listentbl = {{name = 0x440f6d "std", func = 0x40a2f0 <start_connection_thread_std>, l_fd = 3}, {name = 0x44121a "extra", func = 0x40a290 <start_connection_thread_extra>, l_fd = 4}, {
            name = 0x44122c "browser", func = 0x40a2c0 <start_connection_thread_browser>, l_fd = 5}, {name = 0x443268 "ssh", func = 0x40a180 <start_connection_thread_ssh>, l_fd = 6}}
#5  0x0000000000408044 in main (argc=0, argv=0x7ffdaa7d6a40) at gpg-agent.c:1706
        fd = 3
        pid = <optimized out>
        fd_extra = 4
        fd_browser = 5
        fd_ssh = 6
        pargs = {argc = 0x7ffdaa7d673c, argv = 0x7ffdaa7d6730, flags = 32769, err = 0, r_opt = 0, r_type = 0, r = {ret_int = 0, ret_long = 0, ret_ulong = 0, ret_str = 0x0}, internal = {idx = 5, inarg = 0, 
            stopped = 0, last = 0x7ffdaa7d7b1a "--daemon", aliases = 0x0, cur_alias = 0x0, iio_list = 0x0}}
        orig_argc = <optimized out>
        orig_argv = <optimized out>
        configfp = <optimized out>
        configname = 0x0
        shell = <optimized out>
        configlineno = 0
        parse_debug = 0
        default_config = <optimized out>
        pipe_server = 0
        is_daemon = 1
        nodetach = 0
        csh_style = 0
        logfile = 0x0
        debug_wait = 0
        gpgconf_list = <optimized out>
        err = <optimized out>
        malloc_hooks = {malloc = 0x405c60 <gcry_malloc@plt>, realloc = 0x406a30 <gcry_realloc@plt>, free = 0x405fd0 <gcry_free@plt>}