{"record":{"id":"7b7d165b8d8ab95f","repo":"caddyserver/caddy","slug":"re-encoding-module-configuration-v","errorCode":null,"errorMessage":"re-encoding module configuration: %v","messagePattern":"re-encoding module configuration: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"modules.go","lineNumber":282,"sourceCode":"\tvar tmp map[string]any\n\terr := json.Unmarshal(raw, &tmp)\n\tif err != nil {\n\t\treturn \"\", nil, err\n\t}\n\n\tmoduleName, ok := tmp[moduleNameKey].(string)\n\tif !ok || moduleName == \"\" {\n\t\treturn \"\", nil, fmt.Errorf(\"module name not specified with key '%s' in %+v\", moduleNameKey, tmp)\n\t}\n\n\t// remove key from the object, otherwise decoding it later\n\t// will yield an error because the struct won't recognize it\n\t// (this is only needed because we strictly enforce that\n\t// all keys are recognized when loading modules)\n\tdelete(tmp, moduleNameKey)\n\tresult, err := json.Marshal(tmp)\n\tif err != nil {\n\t\treturn \"\", nil, fmt.Errorf(\"re-encoding module configuration: %v\", err)\n\t}\n\n\treturn moduleName, result, nil\n}\n\n// Provisioner is implemented by modules which may need to perform\n// some additional \"setup\" steps immediately after being loaded.\n// Provisioning should be fast (imperceptible running time). If\n// any side-effects result in the execution of this function (e.g.\n// creating global state, any other allocations which require\n// garbage collection, opening files, starting goroutines etc.),\n// be sure to clean up properly by implementing the CleanerUpper\n// interface to avoid leaking resources.\ntype Provisioner interface {\n\tProvision(Context) error\n}\n\n// Validator is implemented by modules which can verify that their","sourceCodeStart":264,"sourceCodeEnd":300,"githubUrl":"https://github.com/caddyserver/caddy/blob/50e54ee279aa1e504fe218ca49ab6ae16c100410/modules.go#L264-L300","documentation":"After extracting the module-name key, getModuleNameInline re-marshals the remaining map back to JSON. json.Marshal of a map[string]any derived from valid JSON essentially cannot fail (the only theoretical failures involve unsupported values like NaN or cyclic structures, which JSON decoding cannot produce), so this error is near-unreachable in practice.","triggerScenarios":"Effectively unreachable through config loading; conceivably triggered by a Go map with non-marshalable values if internal callers ever pass hand-constructed maps rather than decoded JSON.","commonSituations":"If it ever appears, suspect memory corruption or a bug in a custom integration that calls internal JSON loading paths with non-JSON-derived data.","solutions":["Treat it as a bug: report the config and stack trace to the project.","Re-check that the config file is valid JSON from scratch (re-save with UTF-8, no BOM, no control characters).","Retry with a freshly adapted config from 'caddy adapt'."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := caddy.Validate(cfg); err != nil {\n    if strings.Contains(err.Error(), \"re-encoding module configuration\") {\n        // effectively unreachable — file a bug with the config and stack trace\n    }\n    return err\n}","preventionTips":["Treat this error as a bug report, not a config problem.","Keep configs as clean UTF-8 JSON without embedded control characters."],"tags":["json","internal","rare"],"backgroundTag":null,"analyzedSha":"50e54ee279aa1e504fe218ca49ab6ae16c100410","analyzedAt":"2026-08-15T09:20:21.641Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}