Here is a backtrace. This time, there weren't any interesting or unusual messages in ~/.xsession-errors. The user's name did not appear on the top panel, as reported earlier. The backtrace was obtained by attaching to the process.
(gdb) thread apply all bt full Thread 5 (Thread 0x7fe7b2c2c700 (LWP 16566)): #0 0x00007fe7bd8a7ac3 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87 _a3 = -1 _a1 = 140632799675456 resultvar = <optimized out> _a2 = 5 oldtype = 0 result = <optimized out> #1 0x00007fe7bddc74d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fe7bddc7932 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fe7bf35b7f6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007fe7bdde9df5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fe7bdb67b50 in start_thread (arg=<optimized out>) at pthread_create.c:304 __res = <optimized out> pd = 0x7fe7b2c2c700 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140633113282304, -3046831744863170592, 140736370460096, 140633113283008, 140633461465152, 3, 3060230232543596512, 3060197902268764128}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> freesize = <optimized out> __PRETTY_FUNCTION__ = "start_thread" #6 0x00007fe7bd8b270d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #7 0x0000000000000000 in ?? () No symbol table info available. Thread 4 (Thread 0x7fe7b2222700 (LWP 16567)): #0 0x00007fe7bd8a7ac3 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87 _a3 = -1 _a1 = 20376112 resultvar = <optimized out> _a2 = 1 oldtype = 0 result = <optimized out> #1 0x00007fe7bddc74d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fe7bddc7932 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fe7b2227efb in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so No symbol table info available. #4 0x00007fe7bdde9df5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fe7bdb67b50 in start_thread (arg=<optimized out>) at pthread_create.c:304 __res = <optimized out> pd = 0x7fe7b2222700 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140633102755584, -3046831744863170592, 140736370459616, 140633102756288, 140633461465152, 3, 3060229960886915040, 3060197902268764128}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> freesize = <optimized out> __PRETTY_FUNCTION__ = "start_thread" #6 0x00007fe7bd8b270d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #7 0x0000000000000000 in ?? () No symbol table info available. Thread 3 (Thread 0x7fe7b181a700 (LWP 16568)): #0 0x00007fe7bd8a7ac3 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87 _a3 = -1 _a1 = 20502656 resultvar = <optimized out> _a2 = 2 oldtype = 0 result = <optimized out> #1 0x00007fe7be2f6e3f in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0 No symbol table info available. #2 0x00007fe7be2e839c in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0 No symbol table info available. #3 0x00007fe7be2e89f9 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0 No symbol table info available. #4 0x00007fe7be2e8ab0 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0 No symbol table info available. #5 0x00007fe7be2f6def in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0 No symbol table info available. #6 0x00007fe7b7ce5423 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-2.0.so No symbol table info available. #7 0x00007fe7bdb67b50 in start_thread (arg=<optimized out>) at pthread_create.c:304 __res = <optimized out> pd = 0x7fe7b181a700 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140633092237056, -3046831744863170592, 140633297068448, 140633092237760, 140633461465152, 3, 3060224158386098144, 3060197902268764128}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> freesize = <optimized out> __PRETTY_FUNCTION__ = "start_thread" #8 0x00007fe7bd8b270d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #9 0x0000000000000000 in ?? () No symbol table info available. Thread 2 (Thread 0x7fe7b1009700 (LWP 16569)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 No locals. #1 0x00007fe7c5c35c90 in PR_WaitCondVar () from /usr/lib/x86_64-linux-gnu/libnspr4.so No symbol table info available. #2 0x00007fe7c6315ab7 in ?? () from /usr/lib/libmozjs185.so.1.0 No symbol table info available. #3 0x00007fe7c5c3b3b3 in ?? () from /usr/lib/x86_64-linux-gnu/libnspr4.so No symbol table info available. #4 0x00007fe7bdb67b50 in start_thread (arg=<optimized out>) at pthread_create.c:304 __res = <optimized out> pd = 0x7fe7b1009700 unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140633083778816, -3046831744863170592, 140736370458592, 140633083779520, 140633461465152, 3, 3060223068001275872, 3060197902268764128}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> freesize = <optimized out> __PRETTY_FUNCTION__ = "start_thread" #5 0x00007fe7bd8b270d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #6 0x0000000000000000 in ?? () No symbol table info available. Thread 1 (Thread 0x7fe7c77de9a0 (LWP 16564)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162 No locals. #1 0x00007fe7c5c35c90 in PR_WaitCondVar () from /usr/lib/x86_64-linux-gnu/libnspr4.so No symbol table info available. #2 0x00007fe7c630fd42 in ?? () from /usr/lib/libmozjs185.so.1.0 No symbol table info available. #3 0x00007fe7c6315cf9 in ?? () from /usr/lib/libmozjs185.so.1.0 No symbol table info available. #4 0x00007fe7c6316765 in ?? () from /usr/lib/libmozjs185.so.1.0 No symbol table info available. #5 0x00007fe7c73b0de1 in run_leisure_functions (data=0x13358f0) at shell-global.c:1613 closures = <optimized out> iter = <optimized out> ---Type <return> to continue, or q <return> to quit--- #6 run_leisure_functions (data=0x13358f0) at shell-global.c:1596 global = 0x13358f0 #7 0x00007fe7bddc7205 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #8 0x00007fe7bddc7538 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #9 0x00007fe7bddc7932 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #10 0x00007fe7c6a54f27 in meta_run () at core/main.c:555 log_domains = {0x0, 0x7fe7c6a9c71a "mutter", 0x7fe7c6a9ba7b "Gtk", 0x7fe7c6a9ba7f "Gdk", 0x7fe7c6a9ba83 "GLib", 0x7fe7c6a9ba88 "Pango", 0x7fe7c6a9ba8e "GLib-GObject", 0x7fe7c6a9ba9b "GThread"} i = <optimized out> #11 0x0000000000401e77 in main (argc=1, argv=0x7fffbd5e48a8) at main.c:334 ctx = <optimized out> error = 0x0 session_type = <optimized out> ecode = <optimized out> sender = 0x7fe7ac0018f0 (gdb) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org