Hello,
I attempted to upgrade my system from debian
 11 to 12 following the instructions provided at 
https://www.cyberciti.biz/faq/update-upgrade-debian-11-to-debian-12-bookworm. 
 I got to the point of executing the command at step 6 to do sudo apt 
full-upgrade.  At this point my system is in a state where I'm having
 difficulty recovering from.  Dpkg is unable to install any packages and
 terminates with the following error on any package and then segfaults. 
 The system has network access and apt is able to pull packages.  I just
 need to get dpkg working again.
  
dpkg -i gzip_1.12-1_amd64.deb 
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors
dpkg-deb: error: tar subprocess returned error exit status 2
dpkg: error processing archive gzip_1.12-1_amd64.deb (--install):
 dpkg-deb --control subprocess returned error exit status 2
Segmentation fault
  
I attempted to run reportbug from the system but it segfaults after showing the list of related bugs.  
  
I am unable to get a backtrace from gdb since gdb segfaults.
I am able to get a strace off of the command but nothing stands out in the output.
  
I then attempted to use dpkg -D77777 -i gzip_1.12-1_amd64.deb but it doesn't show much more than the above:
/var/cache/apt/archives# dpkg -D77777 -i gzip_1.12-1_amd64.deb 
D000001: root= admindir=/var/lib/dpkg
D000001: ensure_diversions: new, (re)loading
D000001: ensure_statoverrides: new, (re)loading
D000010: path_remove_tree '/var/lib/dpkg/tmp.ci'
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors
dpkg-deb: error: tar subprocess returned error exit status 2
dpkg: error processing archive gzip_1.12-1_amd64.deb (--install):
 dpkg-deb --control subprocess returned error exit status 2
D000010: path_remove_tree '/var/lib/dpkg/tmp.ci'
D000010: path_remove_tree '/var/lib/dpkg/reassemble.deb'
D010000: trigproc_run_deferred
Segmentation fault
  
Do you have any suggestions for further identifying the cause of this and/or resolving this without recovering from back up? Thanks.
Bob