'Segmentation fault (core dumped)' when trying to run 'urbackupsrv assemble'

Server
1

Hey, after using urbackup since quite a while I wanted to test the integrity of my Windows PC’s image backup. For that I wanted to create a VHD file to boot on an VM. But when running the command to merge and decompress the backup files (VHDZ) I got an error that also happens when trying to repair the database.

I am running this on the latest Debian using Docker and backing up on to an 8TB HDD running ext4.
The server has 4 clients (3x Windows and 1x Linux) and the file backups are still accessible as normal and I tried using some of those files and none were corrupted.
The Windows client is running version 2.5.25 and the server on 2.5.33

root@urbackupserver:/# urbackupsrv assemble -a /backups/DESKTOP-VMCD72C/241011-2320_Image_C/Image_C_241011-2320.vhdz -a /backups/DESKTOP-VMCD72C/241011-2320_Image_SYSVOL/Image_SYSVOL_241011-2320.vhdz -a /backups/DESKTOP-VMCD72C/241011-2320_Image_ESP/Image_ESP_241011-2320.vhdz -o /backups/VMCD72C_Disk.vhd
2024-10-18 18:23:30: VHD-Parent: "/backups/DESKTOP-VMCD72C/240911-2015_Image_C/Image_C_240911-2015.vhdz"
2024-10-18 18:23:30: Sectorsize: 512
2024-10-18 18:23:30: Clustersize: 4096
2024-10-18 18:23:30: ClustersPerMFTNode Offset: 48
2024-10-18 18:23:30: MFTStart: 786432
2024-10-18 18:23:30: ERROR: Number of fixups wrong!
2024-10-18 18:23:30: ERROR: Applying fixups failed
2024-10-18 18:23:30: WARNING: Volume  not an NTFS volume. Copying all blocks...
2024-10-18 18:23:30: Sectorsize: 512
2024-10-18 18:23:30: Clustersize: 4096
2024-10-18 18:23:30: ClustersPerMFTNode Offset: 48
2024-10-18 18:23:30: MFTStart: 46592
2024-10-18 18:23:30: ERROR: Number of fixups wrong!
2024-10-18 18:23:30: ERROR: Applying fixups failed
2024-10-18 18:23:30: WARNING: Volume  not an NTFS volume. Copying all blocks...
2024-10-18 18:23:30: ERROR: NTFS magic wrong
2024-10-18 18:23:30: WARNING: Volume  not an NTFS volume. Copying all blocks...
2024-10-18 18:23:30: Writing GPT header...
Segmentation fault (core dumped)

root@urbackupserver:/# urbackupsrv repair-database
2024-10-18 18:18:05: Recovering contents of database with id 20...
Segmentation fault
2

I have the same problem even with a database which seems to be ok. strace gives to following output:

write(1, "2024-10-29 08:33:49: Recovering "..., 672024-10-29 08:33:49: Recovering contents of database with id 20...
) = 67
openat(AT_FDCWD, "urbackup/server_database_export_20.sql", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 6
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x8} ---
+++ killed by SIGSEGV +++
Segmentation fault