#0  malloc_consolidate (av=0x7f99dc38c720) at malloc.c:4272
        fb = <optimized out>
        maxfb = <optimized out>
        p = 0x1478d30
        nextp = 0x14810c0
        unsorted_bin = <optimized out>
        first_unsorted = <optimized out>
        nextchunk = 0x28e7380
        size = 21423696
        nextsize = <optimized out>
        prevsize = <optimized out>
        nextinuse = <optimized out>
        bck = <optimized out>
        fwd = <optimized out>
#1  0x00007f99dc053496 in malloc_consolidate (av=0x7f99dc38c720) at malloc.c:4247
No locals.
#2  _int_malloc (av=0x7f99dc38c720, bytes=1072) at malloc.c:3564
        nb = 1088
        idx = <optimized out>
        bin = <optimized out>
        victim = <optimized out>
        size = <optimized out>
        victim_index = <optimized out>
        remainder = <optimized out>
        remainder_size = <optimized out>
        block = <optimized out>
        bit = <optimized out>
        map = <optimized out>
        fwd = <optimized out>
        bck = <optimized out>
        errstr = 0x0
        __func__ = "_int_malloc"
#3  0x00007f99dc055f95 in __GI___libc_malloc (bytes=1072) at malloc.c:2924
        ar_ptr = <optimized out>
        victim = <optimized out>
        hook = <optimized out>
        __func__ = "__libc_malloc"
#4  0x00007f99dd176f8b in pam_modutil_getpwnam () from /lib/x86_64-linux-gnu/libpam.so.0
No symbol table info available.
#5  0x00007f99d8e7c473 in pam_sm_open_session () from /lib/x86_64-linux-gnu/security/pam_limits.so
No symbol table info available.
#6  0x00007f99dd171b45 in ?? () from /lib/x86_64-linux-gnu/libpam.so.0
No symbol table info available.
#7  0x000000000040a2cc in gdm_session_worker_open_user_session (error=0x7fff6bc67ff0, worker=0x147e020) at gdm-session-worker.c:1801
        error_code = <optimized out>
#8  do_open_session (worker=0x147e020) at gdm-session-worker.c:2181
        error = 0x0
#9  state_change_idle (worker=0x147e020) at gdm-session-worker.c:2282
        new_state = 6
        __PRETTY_FUNCTION__ = "state_change_idle"
#10 0x00007f99dc5ebd13 in g_main_dispatch (context=0x147af10) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:2539
        dispatch = 0x7f99dc5e99e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x147e020
        callback = 0x409720 <state_change_idle>
        cb_funcs = 0x7f99dc8979a0
        cb_data = 0x149c1c0
        current_source_link = {data = 0x1478930, next = 0x0}
        need_destroy = <optimized out>
        source = 0x1478930
        current = 0x14810b0
        i = <optimized out>
#11 g_main_context_dispatch (context=0x147af10) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3075
No locals.
#12 0x00007f99dc5ec060 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x147af10, self=<optimized out>) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3146
        timeout = 0
        some_ready = 1
        fds = <optimized out>
        max_priority = 200
        nfds = 4
        allocated_nfds = <optimized out>
#13 g_main_context_iterate (context=0x147af10, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3083
        some_ready = 1
#14 0x00007f99dc5ec45a in g_main_loop_run (loop=0x147d3b0) at /build/buildd/glib2.0-2.32.4/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#15 0x00000000004052c4 in main (argc=1, argv=0x7fff6bc68278) at session-worker-main.c:203
        main_loop = 0x147d3b0
        context = <optimized out>
        worker = 0x147e020
        signal_handler = 0x1474680
        address = <optimized out>
        entries = {{long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}