(gdb) backtrace
#0  0x00007ffb5374b065 in __GI___lxstat (vers=<optimized out>, name=0x7ffb57a962c0 "/etc/systemd", buf=0x7fff8e314c60)
    at ../sysdeps/unix/sysv/linux/wordsize-64/lxstat.c:37
#1  0x00007ffb536a6c18 in __realpath (name=<optimized out>, resolved=resolved@entry=0x0) at canonicalize.c:161
#2  0x00007ffb536a6f77 in __canonicalize_file_name (name=<optimized out>) at canonicalize.c:244
#3  0x00007ffb555dcafb in readlink_and_canonicalize (
    p=p@entry=0x7ffb590e1fe0 "/etc/systemd/system/multi-user.target.wants/php_fpm_75140c12cfcf430d98e331b27268e87a.socket", r=r@entry=0x7fff8e314da8)
    at ../src/shared/util.c:873
#4  0x00007ffb555c3cd9 in find_symlinks_fd (name=name@entry=0x7ffb6c606164 "srv-bindings-ade5b8399e7042ae918c350897ef4457-files.mount", 
    fd=fd@entry=1299, path=path@entry=0x7ffb9b0d89a0 "/etc/systemd/system/multi-user.target.wants", 
    config_path=config_path@entry=0x7ffb58e11e70 "/etc/systemd/system", same_name_link=same_name_link@entry=0x7fff8e3150ef)
    at ../src/shared/install.c:432
#5  0x00007ffb555c3db4 in find_symlinks_fd (name=name@entry=0x7ffb6c606164 "srv-bindings-ade5b8399e7042ae918c350897ef4457-files.mount", fd=1298, 
    path=0x7ffb58e11e70 "/etc/systemd/system", config_path=0x7ffb58e11e70 "/etc/systemd/system", same_name_link=same_name_link@entry=0x7fff8e3150ef)
    at ../src/shared/install.c:413
#6  0x00007ffb555c40da in find_symlinks (name=name@entry=0x7ffb6c606164 "srv-bindings-ade5b8399e7042ae918c350897ef4457-files.mount", 
    config_path=<optimized out>, same_name_link=same_name_link@entry=0x7fff8e3150ef) at ../src/shared/install.c:497
#7  0x00007ffb555c41ce in find_symlinks_in_scope (scope=scope@entry=UNIT_FILE_SYSTEM, root_dir=root_dir@entry=0x0, 
    name=name@entry=0x7ffb6c606164 "srv-bindings-ade5b8399e7042ae918c350897ef4457-files.mount", state=state@entry=0x7fff8e315154)
    at ../src/shared/install.c:536
#8  0x00007ffb555c6579 in unit_file_get_state (scope=UNIT_FILE_SYSTEM, root_dir=root_dir@entry=0x0, 
    name=0x7ffb6c606164 "srv-bindings-ade5b8399e7042ae918c350897ef4457-files.mount") at ../src/shared/install.c:1711
#9  0x00007ffb555ec1f4 in unit_get_unit_file_state (u=0x7ffb55e46d50) at ../src/core/unit.c:2665
#10 0x00007ffb555b2f13 in bus_unit_append_file_state (i=0x7fff8e3153d0, property=<optimized out>, data=<optimized out>)
    at ../src/core/dbus-unit.c:177
#11 0x00007ffb555e6317 in bus_default_message_handler (c=c@entry=0x7ffb5f8493c0, message=message@entry=0x7ffb5e060a00, 
    introspection=introspection@entry=0x7ffb55618f30 "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\"\n\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n<node>\n <interface name=\"org.freedesktop.systemd1.Unit\">\n"..., 
    interfaces=interfaces@entry=0x7ffb5561bb90 "org.freedesktop.DBus.Properties", bound_properties=bound_properties@entry=0x7fff8e315480)
    at ../src/shared/dbus-common.c:390
#12 0x00007ffb555b76f1 in bus_mount_message_handler (u=0x7ffb55e46d50, c=0x7ffb5f8493c0, message=0x7ffb5e060a00) at ../src/core/dbus-mount.c:172
#13 0x00007ffb555b4ae7 in bus_unit_message_dispatch (message=0x7ffb5e060a00, connection=0x7ffb5f8493c0, u=0x7ffb55e46d50)
    at ../src/core/dbus-unit.c:479
#14 bus_unit_message_handler (connection=0x7ffb5f8493c0, message=0x7ffb5e060a00, data=<optimized out>) at ../src/core/dbus-unit.c:610
#15 0x00007ffb53e73e66 in _dbus_object_tree_dispatch_and_unlock () from /lib64/libdbus-1.so.3
---Type <return> to continue, or q <return> to quit---
#16 0x00007ffb53e66a31 in dbus_connection_dispatch () from /lib64/libdbus-1.so.3
#17 0x00007ffb555acd0a in bus_dispatch (m=m@entry=0x7ffb55b353a0) at ../src/core/dbus.c:525
#18 0x00007ffb5557fb8f in manager_loop (m=0x7ffb55b353a0) at ../src/core/manager.c:1829
#19 0x00007ffb55577539 in main (argc=4, argv=0x7fff8e316238) at ../src/core/main.c:1667