Style/RedundantFormat error undefined method 'type?' for nil

[tagliala]

Tested also against master. At the best of my knowledge, this is not a duplicate

$ bundle exec rubocop test.rb --only Style/RedundantFormat
Inspecting 1 file
An error occurred while Style/RedundantFormat cop was inspecting ./test.rb:2:5.
To see the complete backtrace run rubocop -d.
.

1 file inspected, no offenses detected

1 error occurred:
An error occurred while Style/RedundantFormat cop was inspecting ./test.rb:2:5.
Errors are usually caused by RuboCop bugs.
Please, update to the latest RuboCop version if not already in use, and report a bug if the issue still occurs on this version.
https://github.com/rubocop/rubocop/issues

Mention the following information in the issue report:
1.72.2 (using Parser 3.3.7.1, rubocop-ast 1.38.0, analyzing as Ruby 3.0, running on ruby 3.4.1) [arm64-darwin24]

---

Expected behavior

Cop not returning an error

Actual behavior

Describe here what actually happened.
Please use rubocop --debug when pasting rubocop output as it contains additional information.

Steps to reproduce the problem

1. Create test.rb

config = { username: 'test', password: 'test' }
puts format('%<username>s:%<password>s', **config.slice(:username, :password))

2. bundle exec rubocop test.rb --only Style/RedundantFormat --debug

$ bundle exec rubocop test.rb --only Style/RedundantFormat --debug
For ~/dev/ifad/chronomodel: configuration from ./.rubocop.yml
Default configuration from ~/.rvm/gems/ruby-3.4.1/bundler/gems/rubocop-e585e474e280/config/default.yml
Use parallel by default.
Skipping parallel inspection: only a single file needs inspection
Inspecting 1 file
Scanning ~/dev/ifad/chronomodel/test.rb
An error occurred while Style/RedundantFormat cop was inspecting ,/test.rb:2:5.
undefined method 'type?' for nil
~/.rvm/gems/ruby-3.4.1/bundler/gems/rubocop-e585e474e280/lib/rubocop/cop/style/redundant_format.rb:156:in 'RuboCop::Cop::Style::RedundantFormat#matching_argument?'
~/.rvm/gems/ruby-3.4.1/bundler/gems/rubocop-e585e474e280/lib/rubocop/cop/style/redundant_format.rb:127:in 'block in RuboCop::Cop::Style::RedundantFormat#all_fields_literal?'
~/.rvm/gems/ruby-3.4.1/bundler/gems/rubocop-e585e474e28
...OMISSIS...

rubocop.yml

$ cat .rubocop.yml 
AllCops:
  NewCops: disable

RuboCop version

Tested against master

$ [bundle exec] rubocop -V
$ bundle exec rubocop -V
1.72.2 (using Parser 3.3.7.1, rubocop-ast 1.38.0, analyzing as Ruby 3.0, running on ruby 3.4.1) [arm64-darwin24]

[dvandersluis]

Thanks for the report, I can reproduce. I'll take a look now.