René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"false positive for Lint/UselessAssignment with until loop","articleBody":"I have some text parsing code that passed all lints with rubocop 1.77.0 but has a Lint/UselessAssignment offense as of 1.79.0\n\nI managed to simplify the code to this example:\n\n```ruby\n# frozen_string_literal: true\n\nlist = '3234(234)23'.chars\nin_parens = false\nuntil list.empty?\n  c = list.shift\n  if in_parens\n    if c == ')'\n      in_parens = false\n    else\n      $stdout.puts c\n    end\n  elsif c == '('\n    in_parens = true\n  end\nend\n```\n\n--------\n\n## Expected behavior\n\nNo offenses\n\n## Actual behavior\n```\n$ rubocop --debug test.rb\nFor /app: configuration from /app/.rubocop.yml\nDefault configuration from /home/docker-user/bundle/ruby/3.3.0/gems/rubocop-1.79.0/config/default.yml\nPlugin configuration from /home/docker-user/bundle/ruby/3.3.0/gems/rubocop-rails-2.32.0/config/default.yml\nUse parallel by default.\nSkipping parallel inspection: only a single file needs inspection\nInspecting 1 file\nScanning /app/test.rb\nW\n\nOffenses:\n\ntest.rb:9:7: W: [Correctable] Lint/UselessAssignment: Useless assignment to variable - in_parens.\n      in_parens = false\n      ^^^^^^^^^\n\n1 file inspected, 1 offense detected, 1 offense autocorrectable\nFinished in 0.26479940899298526 seconds\n```\n\n## Steps to reproduce the problem\n\nSee sample code above\n\n## RuboCop version\n\n```\n1.79.0 (using Parser 3.3.9.0, rubocop-ast 1.46.0, analyzing as Ruby 2.7, running on ruby 3.3.7) [x86_64-linux]\n  - rubocop-rails 2.32.0\n```\n","author":{"url":"https://github.com/seandilda","@type":"Person","name":"seandilda"},"datePublished":"2025-07-29T13:06:42.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/14402/rubocop/issues/14402"}