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Bug 1904490 - Backtrace when performing "yum module remove --all perl:common"
Summary: Backtrace when performing "yum module remove --all perl:common"
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: dnf
Version: 8.3
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: 8.0
Assignee: Jaroslav Mracek
QA Contact: Jan Blazek
URL:
Whiteboard:
Depends On: 1951411
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-12-04 15:51 UTC by Renaud Métrich
Modified: 2021-11-10 09:33 UTC (History)
3 users (show)

Fixed In Version: dnf-4.7.0-1.el8
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-11-09 19:52:16 UTC
Type: Bug
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4464 0 None None None 2021-11-09 19:52:27 UTC

Description Renaud Métrich 2020-12-04 15:51:45 UTC 
Description of problem:

When performing "yum module remove --all perl:common" command to remove the perl-5.26 module and associated packages (which has none because apparently the module is "special") the following backtrace is printed:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
# yum module remove --all perl:common
[...]
Traceback (most recent call last):
  File "/usr/bin/yum", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 201, in user_main
    errcode = main(args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 67, in main
    return _main(base, args, cli_class, option_parser_class)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 106, in _main
    return cli_run(cli, base)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 122, in cli_run
    cli.run()
  File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 1162, in run
    return self.command.run()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 377, in run
    self.subcmd.run_on_module()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 254, in run_on_module
    modules_from_specs = self._get_modules_from_name_stream_specs()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 48, in _get_modules_from_name_stream_specs
    name = nsvcap.name if nsvcap.name else ""
AttributeError: 'NoneType' object has no attribute 'name'
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------


Version-Release number of selected component (if applicable):

dnf-4.2.23-4.el8.noarch

How reproducible:

Always

Steps to Reproduce:
1. Enable "perl:5.26" module and install a package

  # yum -y module enable perl:5.26
  # yum -y install perl-DBI

2. Remove the module

  # yum -y module remove --all perl:common


Actual results:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
Traceback (most recent call last):
  File "/usr/bin/yum", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 201, in user_main
    errcode = main(args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 67, in main
    return _main(base, args, cli_class, option_parser_class)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 106, in _main
    return cli_run(cli, base)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 122, in cli_run
    cli.run()
  File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 1162, in run
    return self.command.run()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 377, in run
    self.subcmd.run_on_module()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 254, in run_on_module
    modules_from_specs = self._get_modules_from_name_stream_specs()
  File "/usr/lib/python3.6/site-packages/dnf/cli/commands/module.py", line 48, in _get_modules_from_name_stream_specs
    name = nsvcap.name if nsvcap.name else ""
AttributeError: 'NoneType' object has no attribute 'name'
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Expected results:

No backtrace.

Additional info:

The fact that "perl:5.26" may be some special module may explain this, I don't know:

# yum module info perl:5.26
[...]
Artifacts        :             <<<<< EMPTY
Comment 1 Jaroslav Mracek 2020-12-08 08:22:54 UTC 
Thank you very much for report.

I create a patch that resolves the issue - https://github.com/rpm-software-management/dnf/pull/1699
CI-test: https://github.com/rpm-software-management/ci-dnf-stack/pull/922
Comment 8 errata-xmlrpc 2021-11-09 19:52:16 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: dnf security and bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:4464
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