python-ibmdb: Bug Report: V3.1.4 on z/OS abends S0C4 for function fetch_both() and returns a python UTF decode error for function field_name()

The errors described in this issue are occurring on the IBM Zxplore open learning system for z/OS (anyone can register to join at Zxplore Learning System). I am not an admin of that system and have no access to any software on that system except what the IBM Zxplore admins provide. I have no authority to install or upgrade software on that system, only the IBM Zxplore admins have that authority.

Please advise what I can communicate to the Zxplore admins to get assistance in resolving these issues.

• Operating System Name: z/OS V2.4

• db2level output from clidriver if in use:

• Target Db2 Server Version: V12

• Python Version: Python 3.9.2

• ibm_db version: 3.1.4

• For non-Windows, output of below commands: uname OS/390 uname -m 3931

• Value of below environment variables if set: IBM_DB_HOME: DSNC10 PATH: /usr/lpp/IBM/cvg/go/bin:/usr/lpp/IBM/cyp/v3r9/pyz/bin:/usr/lpp/IBM/zoautil/bin:/usr/lpp/db2c10/jdbc/bin:/bin:/z/bin:.:/usr/lpp/java/J8.0_64/bin:/usr/lpp/zLiberty/V8R5/wlp/bin:/z/z02446/bin:/z/rocket/tools/bin:/usr/lpp/ported/bin:/usr/lpp/IBM/cnj/v18r0/IBM/node-latest-os390-s390x/bin:/usr/lpp/IBM/cnj/v18r0/njsc/bin:/global/node/bin:/usr/lpp/mqm/V9R1M1/web/bin:/usr/lpp/IBM/cobol/igyv6r4/bin LIB/LD_LIBRARY_PATH/DYLD_LIBRARY_PATH: /usr/lpp/db2c10/jdbc/lib

• Test script to reproduce the problem.

• For fetch_both() attached script db_fetch_both_err.py as text file

• For field_name() attached script db_fetch_name_err.py as text file

db_fetch_both_err.py.txt

db_fetch_name_err.py.txt

Steps to Reproduce:

1. python3.9 db_fetch_both_err.py
2. python3.9 db_fetch_name_err.py

Output from test scripts for functions fetch_both() and field_name() (Zxplore userid masked) pasted below. Also uploaded here is the CEEDUMP output from the S0C4 abend as a zip fille.

CEEDUMP.20230528.175140.16842984.zip

/z/zxxxxx > python3.9 db_fetch_both_err.py
Test start fetch_both
Connection done
exec_immediate done
CEE3204S The system detected a protection exception (System Completion Code=0C4).
         From compile unit TOROLABA:./Objects/object.c at entry point PyObject_Hash at statement 769 at compile unit offset +000000001C3A89B4 at entry offset +0000000000000074 at address 000000001C3A89B4.
Segmentation fault

/z/zxxxxx > python3.9 db_fetch_name_err.py
Test start field_name
Connection done
exec_immediate done
first fetch done
row 1 returned 3 columns: Traceback (most recent call last):
  File "/z/zxxxxx/db_fetch_name_err.py", line 41, in <module>
    colname = ibm_db.field_name(stmt, _i)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc5 in position 0: invalid continuation byte