Comment 44 for bug 1988488

Here's the full freeze location (in gst-plugin-scanner) with debug symbols:

#0 0x00007ff635310ec4 in __GI___poll (fds=fds@entry=0x7fff2f5e7790,
    nfds=nfds@entry=1, timeout=timeout@entry=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007ff63479ae23 in poll (__timeout=-1, __nfds=1, __fds=0x7fff2f5e7790)
    at /usr/include/x86_64-linux-gnu/bits/poll2.h:39
#2 read_block (len=8, buf=0x5633edcd0b60, fd=6) at ../../src/xcb_in.c:394
#3 _xcb_in_read_block (c=c@entry=0x5633edcd1f90, buf=0x5633edcd0b60,
    len=len@entry=8) at ../../src/xcb_in.c:1087
#4 0x00007ff63479e522 in read_setup (c=0x5633edcd1f90)
    at ../../src/xcb_conn.c:180
#5 xcb_connect_to_fd (fd=fd@entry=6, auth_info=auth_info@entry=0x7fff2f5e78d0)
    at ../../src/xcb_conn.c:384
#6 0x00007ff63479eedc in xcb_connect_to_display_with_auth_info (
    displayname=displayname@entry=0x5633edcd0a80 ":1024", auth=auth@entry=0x0,
    screenp=screenp@entry=0x0) at ../../src/xcb_util.c:536
#7 0x00007ff63479f06e in xcb_connect (
    displayname=displayname@entry=0x5633edcd0a80 ":1024",
    screenp=screenp@entry=0x0) at ../../src/xcb_util.c:493
#8 0x00007ff634979eea in _XConnectXCB (dpy=0x5633edcd0d20,
    display=0x5633edcd0a80 ":1024", screenp=0x7fff2f5e7aec)
    at ../../src/xcb_disp.c:78
#9 0x00007ff634969d17 in XOpenDisplay (display=0x5633edcd0a80 ":1024")
    at ../../src/OpenDis.c:129
#10 0x00007ff634e9e537 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#11 0x00007ff634e75d28 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#12 0x00007ff634e3a1f7 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so
#13 0x00007ff6356095c5 in ?? ()
   from /lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#14 0x00007ff63561084d in ?? ()
   from /lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#15 0x00007ff6356118f4 in ?? ()
   from /lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#16 0x00007ff6356129b8 in _gst_plugin_loader_client_run ()
   from /lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#17 0x00005633ecaf01dc in ?? ()
#18 0x00007ff635223510 in __libc_start_call_main (
    main=main@entry=0x5633ecaf0120, argc=argc@entry=3,
    argv=argv@entry=0x7fff2f5e81a8)
    at ../sysdeps/nptl/libc_start_call_main.h:58
#19 0x00007ff6352235c9 in __libc_start_main_impl (main=0x5633ecaf0120, argc=3,
    argv=0x7fff2f5e81a8, init=<optimised out>, fini=<optimised out>,
    rtld_fini=<optimised out>, stack_end=0x7fff2f5e8198)
    at ../csu/libc-start.c:381
#20 0x00005633ecaf0235 in _start ()