(gdb) backtrace
#0  pthread_spin_lock (lock=0xaaaaaac2) at ../nptl/sysdeps/x86_64/../i386/pthread_spin_lock.c:35
#1  0x00007ffff7b93d23 in fd_ref (fd=0x555555851e08) at fd.c:447
#2  0x00007ffff53cd8d5 in fuse_write (this=0x5555557840b0, finh=0x7fffe802db60, msg=0x7ffff6406000) at fuse-bridge.c:2226
#3  0x00007ffff53e2148 in fuse_thread_proc (data=0x5555557840b0) at fuse-bridge.c:4607
#4  0x00007ffff7515b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#5  0x00007ffff6e7ba7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()