{"record":{"id":"0cd7f970a0e94934","repo":"kubernetes/kops","slug":"error-re-marshaling-manifest-v","errorCode":null,"errorMessage":"error re-marshaling manifest: %v","messagePattern":"error re-marshaling manifest: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/kubemanifest/manifest.go","lineNumber":119,"sourceCode":"\t\t\treturn true\n\t\t}\n\t}\n\treturn false\n}\n\n// ToYAML serializes a list of objects back to bytes; it is the opposite of LoadObjectsFrom\nfunc (l ObjectList) ToYAML() ([]byte, error) {\n\tyamlSeparator := []byte(\"\\n---\\n\\n\")\n\tvar yamls [][]byte\n\tfor _, object := range l {\n\t\t// Don't serialize empty objects - they confuse yaml parsers\n\t\tif object.IsEmptyObject() {\n\t\t\tcontinue\n\t\t}\n\n\t\ty, err := object.ToYAML()\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"error re-marshaling manifest: %v\", err)\n\t\t}\n\n\t\tyamls = append(yamls, y)\n\t}\n\n\treturn bytes.Join(yamls, yamlSeparator), nil\n}\n\nfunc (m *Object) ToYAML() ([]byte, error) {\n\tb, err := yaml.Marshal(m.data)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"error marshaling manifest to yaml: %w\", err)\n\t}\n\treturn b, nil\n}\n\nfunc (m *Object) MarshalJSON() ([]byte, error) {\n\tb, err := json.Marshal(m.data)","sourceCodeStart":101,"sourceCodeEnd":137,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/pkg/kubemanifest/manifest.go#L101-L137","documentation":"ToYAML re-serializes each Object in the manifest back to YAML and joins documents. If any individual object's ToYAML (yaml.Marshal of its data map) fails, the multi-document write is aborted with this error. This surfaces Marshal failures such as unencodable values inside the parsed data.","triggerScenarios":"Calling ToYAML (or its callers Replace/Build) after the manifest data map contains values that yaml.Marshal cannot serialize — e.g. channels, funcs, or cyclic structures injected programmatically into the Object's data.","commonSituations":"Programmatic manifest mutation that inserted unsupported Go values into the object map; corrupted in-memory data after a buggy transformation.","solutions":["Inspect what was inserted into the object's data map; only plain YAML-representable values (maps, slices, scalars) are allowed","Use the wrapped error to identify the unserializable value's path","Re-parse the manifest from disk to reset the data to clean values","Fix the transformation code (e.g. addPodSpecLabels-style rewriters) to avoid injecting non-basic types"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// verify data contains only YAML-safe values before ToYAML\nfunc yamlSafe(v interface{}) bool {\n\tswitch t := v.(type) {\n\tcase map[string]interface{}:\n\t\tfor _, vv := range t { if !yamlSafe(vv) { return false } }\n\tcase []interface{}:\n\t\tfor _, vv := range t { if !yamlSafe(vv) { return false } }\n\tcase string, bool, int, int64, float64, nil:\n\t\treturn true\n\tdefault:\n\t\treturn false\n\t}\n\treturn true\n}\n","typeGuard":null,"tryCatchPattern":"y, err := manifest.ToYAML()\nif err != nil {\n\treturn fmt.Errorf(\"manifest rewrite produced unserializable data: %w\", err)\n}\n","preventionTips":["Only insert plain maps/slices/scalars into Object data","Re-parse from source YAML after suspicious mutations","Unit-test manifest rewriting round-trips (load -> mutate -> ToYAML)","Avoid storing Go-native types in generic manifest maps"],"tags":["yaml","serialization","manifest"],"backgroundTag":"yaml-marshal-failed","analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T07:17:12.445Z"}