{"record":{"id":"78d9ffb79ec12ebd","repo":"ytdl-org/youtube-dl","slug":"function-string-s-is-not-yet-implemented","errorCode":null,"errorMessage":"Function String.%s is not yet implemented","messagePattern":"Function String\\.(.+?) is not yet implemented","errorType":"exception","errorClass":"NotImplementedError","httpStatus":null,"severity":"error","filePath":"youtube_dl/swfinterp.py","lineNumber":548,"sourceCode":"                    mname = self.multinames[index]\n                    arg_count = u30()\n                    args = list(reversed(\n                        [stack.pop() for _ in range(arg_count)]))\n                    obj = stack.pop()\n\n                    if obj == StringClass:\n                        if mname == 'String':\n                            assert len(args) == 1\n                            assert isinstance(args[0], (\n                                int, compat_str, _Undefined))\n                            if args[0] == undefined:\n                                res = 'undefined'\n                            else:\n                                res = compat_str(args[0])\n                            stack.append(res)\n                            continue\n                        else:\n                            raise NotImplementedError(\n                                'Function String.%s is not yet implemented'\n                                % mname)\n                    elif isinstance(obj, _AVMClass_Object):\n                        func = self.extract_function(obj.avm_class, mname)\n                        res = func(args)\n                        stack.append(res)\n                        continue\n                    elif isinstance(obj, _AVMClass):\n                        func = self.extract_function(obj, mname)\n                        res = func(args)\n                        stack.append(res)\n                        continue\n                    elif isinstance(obj, _ScopeDict):\n                        if mname in obj.avm_class.method_names:\n                            func = self.extract_function(obj.avm_class, mname)\n                            res = func(args)\n                        else:\n                            res = obj[mname]","sourceCodeStart":530,"sourceCodeEnd":566,"githubUrl":"https://github.com/ytdl-org/youtube-dl/blob/956b8c585591b401a543e409accb163eeaaa1193/youtube_dl/swfinterp.py#L530-L566","documentation":"Error \"Function String.%s is not yet implemented\" thrown in ytdl-org/youtube-dl.","triggerScenarios":"Thrown at youtube_dl/swfinterp.py:548 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Update youtube-dl; that String method is not implemented in the SWF interpreter."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"956b8c585591b401a543e409accb163eeaaa1193","analyzedAt":"2026-08-14T18:59:47.863Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}