Hi, please upgrade to latest dnf-plugins-extras, which (from Fedora 26 onwards) provides system-upgrade plugin. This issue should be already fixed. In case of any problems, don't hesitate to reopen the bug.
Concerning -1 argument: dnf log is now not able to filter list of boots.
Description of problem: dnf system-upgrade log fails to list boots when upgrade was attempted, instead Version-Release number of selected component (if applicable): 2.0.1-1.fc26.noarch How reproducible: Every time Steps to Reproduce: 1. dnf system-upgrade log Actual results: Traceback (most recent call last): File "/usr/bin/dnf", 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 179, in user_main errcode = main(args) File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 64, in main return _main(base, args, cli_class, option_parser_class) File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 99, in _main return cli_run(cli, base) File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 115, in cli_run cli.run() File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 962, in run return self.command.run() File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 335, in run self._call_sub("run", self.opts) File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 343, in _call_sub subfunc(*args) File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 503, in run_log assert extcmds[0] == 'log' TypeError: 'Namespace' object does not support indexing Expected results: list of boots when upgrade was attempted Additional info: dnf system-upgrade log -1 produces this: usage: dnf system-upgrade [-c [config file]] [-q] [-v] [--version] [--installroot [path]] [--nodocs] [--noplugins] [--enableplugin [plugin]] [--disableplugin [plugin]] [--releasever RELEASEVER] [--setopt SETOPTS] [--skip-broken] [-h] [--allowerasing] [-b] [-C] [-R [minutes]] [-d [debug level]] [--debugsolver] [--showduplicates] [-e ERRORLEVEL] [--obsoletes] [--rpmverbosity [debug level name]] [-y] [--assumeno] [--enablerepo [repo]] [--disablerepo [repo] | --repo [repo]] [-x [package]] [--disableexcludes [repo]] [--repofrompath [repo,path]] [--nogpgcheck] [--color COLOR] [--refresh] [-4] [-6] [--downloadonly] [--bugfix] [--enhancement] [--newpackage] [--security] [--advisory ADVISORY] [--bzs BUGZILLA] [--cves CVES] [--sec-severity {Critical,Important,Moderate,Low}] [--datadir DATADIR] [--no-downgrade] [download|clean|reboot|upgrade|log] dnf system-upgrade: error: unrecognized arguments: 1