{"record":{"id":"abc80561cd9aa37b","repo":"mame/quine-relay","slug":"illegal-final-machine-state","errorCode":null,"errorMessage":"illegal final machine state","messagePattern":"illegal final machine state","errorType":"exception","errorClass":"Grass::IllegalState","httpStatus":null,"severity":"error","filePath":"vendor/grass.rb","lineNumber":161,"sourceCode":"    end\n  end\n\n  private\n\n  def eval(m)\n    while true\n      insn = m.code.shift\n      if insn then\n        insn.eval m\n      else\n        break if m.dump.empty?\n        ret = m.env.last\n        raise IllegalState, \"no return value\" unless ret\n        m.code, m.env = m.dump.pop\n        m.env.push ret\n      end\n    end\n    raise IllegalState, \"illegal final machine state\" unless m.env.size == 1\n    m.env.first\n  end\n\n  InitialEnv = [In.new, CharFn.new(?w.ord), Succ.new, Out.new]\n  InitialDump = [[[], []], [[App.new(1, 1)], []]]\n\n  def start(code)\n    eval Machine.new(code, InitialEnv, InitialDump)\n  end\n\n  def parse(src)\n    code = []\n    src = src.sub(/\\A[^wｗ]*/, '').gsub(/[^wｗWＷvｖ]/, '')\n    src.split(/[vｖ]+/).each { |s|\n      a = s.scan(/[wｗ]+|[WＷ]+/).map { |i| i.split(//).size }\n      arity = 0\n      arity = a.shift if /\\A[wｗ]/ =~ s\n      raise \"parse error at app\" unless a.size % 2 == 0","sourceCodeStart":143,"sourceCodeEnd":179,"githubUrl":"https://github.com/mame/quine-relay/blob/c2aa5098d3e95409a36185b16371089dd04db642/vendor/grass.rb#L143-L179","documentation":"Error \"illegal final machine state\" thrown in mame/quine-relay.","triggerScenarios":"Thrown at vendor/grass.rb:161 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c2aa5098d3e95409a36185b16371089dd04db642","analyzedAt":"2026-08-21T15:28:43.741Z","schemaVersion":2},"datasetVersion":"2026-08-21T18:17:14.833Z"}