#0  0x00007f179fb4c117 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#1  0x00007f179fb4d808 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007f17a0537309 in nih_free (ptr=0x0) at alloc.c:318
  [Error: alloc.c was not found in source tree]
#3  0x0000000000422ae0 in cgm_get (controller=0x4272c7 "systemd", cgroup_path=0x8b6ea1 "user/1000.user/c2.session", cgroup_path@entry=0x8b6ea0 "/user/1000.user/c2.session", key=key@entry=0x433f05 "tasks") at ../src/shared/cgmanager.c:143
  [Error: ../src/shared/cgmanager.c was not found in source tree]
#4  0x0000000000420aa7 in cg_enumerate_tasks (controller=0x42618a "name=systemd", path=0x8b6ea0 "/user/1000.user/c2.session", _f=_f@entry=0x7fffff837248) at ../src/shared/cgroup-util.c:128
  [Error: ../src/shared/cgroup-util.c was not found in source tree]
#5  0x0000000000420c6a in cg_is_empty (controller=<optimized out>, path=<optimized out>, ignore_self=true) at ../src/shared/cgroup-util.c:1125
  [Error: ../src/shared/cgroup-util.c was not found in source tree]
#6  0x0000000000420dcb in cg_is_empty_recursive (controller=controller@entry=0x42618a "name=systemd", path=0x8b6ea0 "/user/1000.user/c2.session", ignore_self=ignore_self@entry=true) at ../src/shared/cgroup-util.c:1171
  [Error: ../src/shared/cgroup-util.c was not found in source tree]
#7  0x000000000040feab in session_terminate_cgroup (s=0x8b6960) at ../src/login/logind-session.c:651
  [Error: ../src/login/logind-session.c was not found in source tree]
#8  session_stop (s=s@entry=0x8b6960) at ../src/login/logind-session.c:709
  [Error: ../src/login/logind-session.c was not found in source tree]
#9  0x0000000000409630 in manager_dispatch_other (fd=23, m=0x8a5010) at ../src/login/logind.c:1262
  [Error: ../src/login/logind.c was not found in source tree]
#10 manager_run (m=m@entry=0x8a5010) at ../src/login/logind.c:1795
  [Error: ../src/login/logind.c was not found in source tree]
#11 0x000000000040622c in main (argc=<optimized out>, argv=<optimized out>) at ../src/login/logind.c:1872
  [Error: ../src/login/logind.c was not found in source tree]