I have an lpar that I upgraded from aix 7.1.4.3 to aix 7.3.1.2. I then successfully installed dnf but when I do a 'dnf update' I get a seg fault:

dnf -vvv update
DNF version: 4.2.17
cachedir: /var/cache/dnf
os-release file not found
os-release: falling back to basic User-Agent: missing NAME or VERSION_ID
repo: using cache for: AIX_Toolbox
Segmentation fault(coredump)

If I dbx the core:

dbx /opt/freeware/bin/python3.9 /var/cache/dnf/core
Type 'help' for help.
[using memory image in /var/cache/dnf/core]
reading symbolic information ...internal error: assertion failed at line 6693 in file object.c
internal error: assertion failed at line 6693 in file object.c
internal error: assertion failed at line 6693 in file object.c

.

.

.

internal error: assertion failed at line 6693 in file object.c

Segmentation fault in inftrees.inflate_table [/opt/freeware/lib/libz.a] at 0x900000000d31e24 ($t1)
0x900000000d31e24 (inflate_table+0x724) 7e93c92e           stwx   r20,r19,r25
(dbx)

When I look at /var/cache/dnf:

/var/cache/dnf # ls -al
total 50320
drwxr-xr-x    3 root     system          256 Mar 26 16:28 .
drwxr-xr-x    3 root     system          256 Mar 26 15:44 ..
drwxr-xr-x    3 root     system          256 Mar 26 15:49 AIX_Toolbox-65d76c2c8658fdd3
-rw-------    1 root     system     25754452 Mar 27 10:34 core
-rw-r--r--    1 root     system            2 Mar 26 16:01 expired_repos.json
-rw-r--r--    1 root     system            8 Mar 27 10:34 metadata_lock.pid

Shouldn't there be more files in this directory? Any hints as to why it would seg fault?

There won't be files in the cache until you do the update.

Until then, this SHOULD be a link 

 /opt/freeware/lib/libz.a SHOULD be a link to /usr/opt/rpm/lib/libz.a , which  is provided by rpm.rte.

1) First, verify this is a symlink:

# ls -l /opt/freeware/lib/libz.a
lrwxrwxrwx    1 root     system           23 Mar 27 11:36 /opt/freeware/lib/libz.a -> /usr/opt/rpm/lib/libz.a

2) If it is correctly linked, what is your rpm.rte level?

lslpp -l rpm.rte

lppchk -c rpm.rte

I have an lpar that I upgraded from aix 7.1.4.3 to aix 7.3.1.2. I then successfully installed dnf but when I do a 'dnf update' I get a seg fault:

dnf -vvv update
DNF version: 4.2.17
cachedir: /var/cache/dnf
os-release file not found
os-release: falling back to basic User-Agent: missing NAME or VERSION_ID
repo: using cache for: AIX_Toolbox
Segmentation fault(coredump)

If I dbx the core:

dbx /opt/freeware/bin/python3.9 /var/cache/dnf/core
Type 'help' for help.
[using memory image in /var/cache/dnf/core]
reading symbolic information ...internal error: assertion failed at line 6693 in file object.c
internal error: assertion failed at line 6693 in file object.c
internal error: assertion failed at line 6693 in file object.c

.

.

.

internal error: assertion failed at line 6693 in file object.c

Segmentation fault in inftrees.inflate_table [/opt/freeware/lib/libz.a] at 0x900000000d31e24 ($t1)
0x900000000d31e24 (inflate_table+0x724) 7e93c92e           stwx   r20,r19,r25
(dbx)

When I look at /var/cache/dnf:

/var/cache/dnf # ls -al
total 50320
drwxr-xr-x    3 root     system          256 Mar 26 16:28 .
drwxr-xr-x    3 root     system          256 Mar 26 15:44 ..
drwxr-xr-x    3 root     system          256 Mar 26 15:49 AIX_Toolbox-65d76c2c8658fdd3
-rw-------    1 root     system     25754452 Mar 27 10:34 core
-rw-r--r--    1 root     system            2 Mar 26 16:01 expired_repos.json
-rw-r--r--    1 root     system            8 Mar 27 10:34 metadata_lock.pid

Shouldn't there be more files in this directory? Any hints as to why it would seg fault?