.
Thread 5 (LWP 29204):
#0  0x00007ff113bcd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007ff1146291ec in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 4 (LWP 29201):
#0  0x00007ff113bcd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007ff1146291ec in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 29202):
#0  0x00007ff113bcd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007ff1146291ec in ?? ()
No symbol table info available.
#2  0x0000000000000020 in ?? ()
No symbol table info available.
#3  0x0000000100ce4880 in ?? ()
No symbol table info available.
#4  0xffffffff7fffffff in ?? ()
No symbol table info available.
#5  0xbbc17d791ca11600 in ?? ()
No symbol table info available.
#6  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 29205):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007ff11466db1a in ?? ()
No symbol table info available.
#2  0x000000000003f6e4 in ?? ()
No symbol table info available.
#3  0x0000000013535f25 in ?? ()
No symbol table info available.
#4  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 29200):
#0  0x00007ff11462f89b in ?? ()
No symbol table info available.
#1  0x000000000176d2b0 in ?? ()
No symbol table info available.
#2  0x00007ff116c7040e in ?? () from /tmp/apport_sandbox_0jBmD6/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#3  0x0000000000000000 in ?? ()
No symbol table info available.