Bug in dar version 2.7.8 (?)

Dear Denis and all,
  today I find this output every time my scheduled differential backup
runs, after I took a Normal backup this morning (as I usually do the
first days of each month):

************************************************************************************************
No terminal found for user interaction. All questions will be assumed a negative answer (less destructive choice), which most of the time will abort the program.
Arguments read from /etc/darrc :

No user target found on command line
Opening archive CAT_root ...
Opening the archive using the multi-slice abstraction layer...
Reading the archive trailer...
Final memory cleanup...
---- exception type = [BUG] ----------
[source]
	File slice_layout.cpp line 48 : it seems to be a bug here
	stack dump : /lib64/libdar64.so.6000(_ZN6libdar4EbugC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEi+0x113) [0x7f8d9f524483]
	stack dump : /lib64/libdar64.so.6000(+0xbce43) [0x7f8d9f4bce43]
	stack dump : /lib64/libdar64.so.6000(_ZN6libdar14header_version4readERNS_12generic_fileERNS_16user_interactionEb+0x266) [0x7f8d9f5564c6]
	stack dump : /lib64/libdar64.so.6000(_ZN6libdar24macro_tools_open_archiveERKSt10shared_ptrINS_16user_interactionEERKS0_INS_8entrepotEERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_8limitintImEESG_NS_11crypto_algoERKNS_11secu_stringEjRNS_4pileERNS_14header_versionESG_SG_SG_RSI_bbbbRNS9_4listINS_8signatorESaISV_EEERNS_12slice_layoutEmmb+0x46d) [0x7f8d9f577e4d]
	stack dump : /lib64/libdar64.so.6000(_ZN6libdar7archive9i_archiveC1ERKSt10shared_ptrINS_16user_interactionEERKNS_4pathERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESH_RKNS_20archive_options_readE+0x450) [0x7f8d9f5574f0]
	stack dump : /lib64/libdar64.so.6000(_ZN6libdar7archiveC2ERKSt10shared_ptrINS_16user_interactionEERKNS_4pathERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESG_RKNS_20archive_options_readE+0xdb) [0x7f8d9f4ddc3b]
	stack dump : dar(+0x3fc81) [0x55a69934ac81]
	stack dump : dar(+0x549f7) [0x55a69935f9f7]
	stack dump : /lib64/libc.so.6(+0x27510) [0x7f8d9ee4a510]
	stack dump : /lib64/libc.so.6(__libc_start_main+0x89) [0x7f8d9ee4a5c9]
	stack dump : dar(+0x20c25) [0x55a69932bc25]
[most outside call]
-----------------------------------

INTERNAL ERROR, PLEASE REPORT THE PREVIOUS OUTPUT TO MAINTAINER
************************************************************************************************


The command I run is:
dar -c /run/media/andrea/BAK_ANDVAI/root_diff_Ore -R / -B /home/andrea/myProgs/Backup/esclusiDiffRoot.dcf -P home/andrea/Backup/backuplog_root_Ore.txt -D -A /home/andrea/Backup/CAT_root -w -v 2>&1

Dar version:
$ dar --version

 dar version 2.7.8, Copyright (C) 2002-2022 Denis Corbin
   Long options support         : YES

 Using libdar 6.5.0 built with compilation time options:
   gzip compression (libz)      : YES
   bzip2 compression (libbzip2) : YES
   lzo compression (liblzo2)    : YES
   xz compression (liblzma)     : YES
   zstd compression (libzstd)   : NO
   lz4 compression (liblz4)     : NO
   Strong encryption (libgcrypt): YES
   Public key ciphers (gpgme)   : NO
   Extended Attributes support  : YES
   Large files support (> 2GB)  : YES
   ext2fs NODUMP flag support   : YES
   Integer size used            : 64 bits
   Thread safe support          : YES
   Furtive read mode support    : YES
   Linux ext2/3/4 FSA support   : YES
   Mac OS X HFS+ FSA support    : NO
   Linux statx() support        : YES
   Detected system/CPU endian   : little
   Posix fadvise support        : YES
   Large dir. speed optimi.     : YES
   Timestamp read accuracy      : 1 nanosecond
   Timestamp write accuracy     : 1 nanosecond
   Restores dates of symlinks   : YES
   Multiple threads (libthreads): NO 
   Delta compression (librsync) : NO
   Remote repository (libcurl)  : NO 
   argon2 hashing (libargon2)   : NO

 compiled the Dec 28 2022 with GNUC version 12.2.1 20221121 (Red Hat 12.2.1-4)
 dar is part of the Disk ARchive suite (Release 2.7.8)
 dar comes with ABSOLUTELY NO WARRANTY; for details
 type `dar -W'. This is free software, and you are welcome
 to redistribute it under certain conditions; type `dar -L | more'
 for details.
************************************************************************************************

I am not sure whether the version I used to take the normal backup is the same or not. If it's useful I can find it out.
Is it really a bug, can I do anything to help or am I missing something?

Many thanks,
bye
Andrea