{"record":{"id":"efc4037d849272cd","repo":"ruby/rubygems","slug":"unsupported-user-class-resolve-class-r-name-in","errorCode":null,"errorMessage":"Unsupported user class #{resolve_class(r.name)} in marshal stream @ #{stack.join(\".\")}","messagePattern":"Unsupported user class #(.+?) in marshal stream @ #(.+?)","errorType":"exception","errorClass":"Gem::SafeMarshal::Visitors::ToRuby::UnsupportedError","httpStatus":null,"severity":"error","filePath":"lib/rubygems/safe_marshal/visitors/to_ruby.rb","lineNumber":284,"sourceCode":"\n          hash = register_object({}.compare_by_identity)\n\n          o = r.wrapped_object\n          o.pairs.each_with_index do |(k, v), i|\n            push_stack i\n            k = visit(k)\n            push_stack k\n            hash[k] = visit(v)\n          end\n\n          if o.is_a?(Elements::HashWithDefaultValue)\n            push_stack :default\n            hash.default = visit(o.default)\n          end\n\n          hash\n        else\n          raise UnsupportedError.new(\"Unsupported user class #{resolve_class(r.name)} in marshal stream\", stack: formatted_stack)\n        end\n      end\n\n      def resolve_class(n)\n        @class_cache[n] ||= begin\n          to_s = resolve_symbol_name(n)\n          raise UnpermittedClassError.new(name: to_s, stack: formatted_stack) unless @permitted_classes.include?(to_s)\n          visit_symbol_type(n)\n          begin\n            ::Object.const_get(to_s)\n          rescue NameError\n            raise ArgumentError, \"Undefined class #{to_s.inspect}\"\n          end\n        end\n      end\n\n      class RationalCompat\n        def marshal_load(s)","sourceCodeStart":266,"sourceCodeEnd":302,"githubUrl":"https://github.com/ruby/rubygems/blob/86cbb817a38ce8477b181c17467a703ded3f2be8/lib/rubygems/safe_marshal/visitors/to_ruby.rb#L266-L302","documentation":"Error \"Unsupported user class #{resolve_class(r.name)} in marshal stream @ #{stack.join(\".\")}\" thrown in ruby/rubygems.","triggerScenarios":"Thrown at lib/rubygems/safe_marshal/visitors/to_ruby.rb:284 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["The metadata embeds an unsupported user class; rebuild the gem with a current RubyGems"],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"86cbb817a38ce8477b181c17467a703ded3f2be8","analyzedAt":"2026-08-23T06:27:48.159Z","schemaVersion":2},"datasetVersion":"2026-08-23T08:06:27.607Z"}