#0  0x00007f8a8eab20b7 in socket () at ../sysdeps/unix/syscall-template.S:81
  [Error: ../sysdeps/unix/syscall-template.S was not found in source tree]
#1  0x00007f8a8f1d7d41 in sd_pid_notify_with_fds (state=state@entry=0x7f8a8f218754 "WATCHDOG=1", n_fds=0, fds=0x0, unset_environment=0, pid=0) at ../src/libsystemd/sd-daemon/sd-daemon.c:383
  [Error: ../src/libsystemd/sd-daemon/sd-daemon.c was not found in source tree]
#2  0x00007f8a8f1d8e15 in sd_notify.constprop.39 (state=state@entry=0x7f8a8f218754 "WATCHDOG=1", unset_environment=0) at ../src/libsystemd/sd-daemon/sd-daemon.c:469
  [Error: ../src/libsystemd/sd-daemon/sd-daemon.c was not found in source tree]
#3  0x00007f8a8f2027fb in process_watchdog (e=0x7f8a906af200) at ../src/libsystemd/sd-event/sd-event.c:2295
  [Error: ../src/libsystemd/sd-event/sd-event.c was not found in source tree]
#4  sd_event_wait (e=0x7f8a906af200, timeout=<optimized out>) at ../src/libsystemd/sd-event/sd-event.c:2411
  [Error: ../src/libsystemd/sd-event/sd-event.c was not found in source tree]
#5  0x00007f8a8f1c5e97 in sd_event_run (timeout=<optimized out>, e=<optimized out>) at ../src/libsystemd/sd-event/sd-event.c:2499
  [Error: ../src/libsystemd/sd-event/sd-event.c was not found in source tree]
#6  manager_run (m=<optimized out>) at ../src/login/logind.c:1119
  [Error: ../src/login/logind.c was not found in source tree]
#7  main (argc=1, argv=0x80002) at ../src/login/logind.c:1181
  [Error: ../src/login/logind.c was not found in source tree]