src/caencoder.c:1949: ca_encoder_initialize_name_table: Assertion `!n->name_table' failed

[kakra]

When running casync make I receive the following error:

casync: ../casync-2_p20180321/src/caencoder.c:1949: ca_encoder_initialize_name_table: Assertion `!n->name_table' failed.
make: *** [Makefile:14: gentoo_kibana_base.caidx] Abgebrochen (Speicherauszug erstellt)

This only happens for one of the machines stored in the shared storage.

jupiter casync # coredumpctl info casync
           PID: 3011 (casync)
           PID: 3011 (casync)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 6 (ABRT)
     Timestamp: Sun 2018-09-16 05:42:10 CEST (21min ago)
  Command Line: casync -c --compress=xz make gentoo_kibana_base.caidx /var/lib/machines/gentoo_kibana_base/
    Executable: /usr/bin/casync
 Control Group: /user.slice/user-500.slice/session-c1.scope
          Unit: session-c1.scope
         Slice: user-500.slice
       Session: c1
     Owner UID: 500 (kakra)
       Boot ID: 131e7af516934ec4a797de60b79e51f8
    Machine ID: 121b87ca633e8ac0016656680000001b
      Hostname: jupiter
       Storage: /var/lib/systemd/coredump/core.casync.0.131e7af516934ec4a797de60b79e51f8.3011.1537069330000000.lz4
       Message: Process 3011 (casync) of user 0 dumped core.
                
                Stack trace of thread 3011:
                #0  0x00007f2228156fd0 __GI_raise (libc.so.6)
                #1  0x00007f2228158b27 __GI_abort (libc.so.6)
                #2  0x00007f222814e92a __assert_fail_base (libc.so.6)
                #3  0x00007f222814e9b2 __GI___assert_fail (libc.so.6)
                #4  0x0000562214ef2879 ca_encoder_initialize_name_table (casync)
                #5  0x0000562214ef38f4 ca_encoder_step_node (casync)
                #6  0x0000562214ef4856 ca_encoder_step_node (casync)
                #7  0x0000562214ecf307 ca_sync_step_encode (casync)
                #8  0x0000562214eb7d22 verb_make (casync)
                #9  0x0000562214eb359f dispatch_verb (casync)
                #10 0x00007f2228141faa __libc_start_main (libc.so.6)
                #11 0x0000562214eb642a _start (casync)

Running on Gentoo.

[kakra]

Deleting the .cacac directory fixes this but I'm sure this error is not intended in the first place... What may have happened: The machines are clones (generated with machinectl clone, and maybe even one was cloned while casync make -c was running. But I think the cache directory should be transaction save, or simply discard what smells fishy...