{"record":{"id":"1d90a5868a9f3e5a","repo":"GoogleContainerTools/skaffold","slug":"marshaling-new-config-w","errorCode":null,"errorMessage":"marshaling new config: %w","messagePattern":"marshaling new config: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/skaffold/app/cmd/fix.go","lineNumber":119,"sourceCode":"\t\tvar cfgs parser.SkaffoldConfigSet\n\t\tfor _, cfg := range upgraded {\n\t\t\tcpCfg := latest.NewSkaffoldConfig()\n\t\t\tif err = util2.DeepCopy(cpCfg, cfg); err != nil {\n\t\t\t\tcpCfg = cfg\n\t\t\t}\n\t\t\tdefaults.Set(cpCfg.(*latest.SkaffoldConfig))\n\t\t\tcfgs = append(cfgs, &parser.SkaffoldConfigEntry{\n\t\t\t\tSkaffoldConfig: cpCfg.(*latest.SkaffoldConfig),\n\t\t\t\tSourceFile:     configFile,\n\t\t\t\tIsRootConfig:   true})\n\t\t}\n\t\tif err := validation.Process(cfgs, validation.GetValidationOpts(opts)); err != nil {\n\t\t\treturn fmt.Errorf(\"validating upgraded config: %w\", err)\n\t\t}\n\t}\n\tnewCfg, err := yaml.MarshalWithSeparator(upgraded)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"marshaling new config: %w\", err)\n\t}\n\tif outFile != \"\" {\n\t\tvar writeErr error\n\t\tif overwrite {\n\t\t\toldCfg, readErr := os.ReadFile(configFile)\n\t\t\tif readErr != nil {\n\t\t\t\treturn fmt.Errorf(\"reading config file: %w\", readErr)\n\t\t\t}\n\t\t\tnewFile := fmt.Sprintf(\"%s.v2\", outFile)\n\n\t\t\twriteErr = os.WriteFile(newFile, oldCfg, 0644)\n\t\t\tif writeErr == nil {\n\t\t\t\toutput.Default.Fprintln(out, \"Backed up previous skaffold.yaml at \", newFile)\n\t\t\t}\n\t\t}\n\t\tif err := os.WriteFile(outFile, newCfg, 0644); err != nil {\n\t\t\treturn fmt.Errorf(\"writing config file: %w\", err)\n\t\t}","sourceCodeStart":101,"sourceCodeEnd":137,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/cmd/skaffold/app/cmd/fix.go#L101-L137","documentation":"`skaffold fix` successfully upgraded and validated the config, then tried to serialize it back to YAML with `yaml.MarshalWithSeparator`. This error wraps any failure of that marshaling step. It is rare and usually indicates an internal problem — a config value that cannot be represented in YAML (e.g. an unsupported type) rather than user error.","triggerScenarios":"`yaml.MarshalWithSeparator(upgraded)` returns an error, typically when the upgraded in-memory config contains a value that cannot be serialized to YAML by the yaml library.","commonSituations":"Practically only seen with corrupted or unusual intermediate config state, custom skaffold forks/plugins injecting non-serializable fields, or a bug in the config upgrade code.","solutions":["Re-run `skaffold fix` — transient/marshal issues are not user-fixable state, so first confirm it reproduces.","Check your skaffold version and upgrade to the latest patch release; marshal bugs are fixed upstream.","If reproducible, reduce the config to the smallest skaffold.yaml that triggers it and file an issue.","As a workaround, convert the config manually: run fix without --overwrite and hand-edit the output."],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"// Verify skaffold and the yaml round-trip work with the current config before fixing\nconst check = execFileSync('skaffold', ['config', 'list'], {stdio: 'pipe'}); // ensures skaffold binary is healthy\nconst parsed = require('js-yaml').load(require('fs').readFileSync('skaffold.yaml', 'utf8'));\nif (!parsed || typeof parsed !== 'object' || !parsed.apiVersion) throw new Error('skaffold.yaml is not a parseable skaffold config');","typeGuard":null,"tryCatchPattern":"try {\n  execFileSync('skaffold', ['fix', '--output', 'skaffold.fixed.yaml']);\n} catch (e) {\n  const msg = e.stderr?.toString() ?? '';\n  if (msg.includes('marshaling new config')) {\n    console.error('Marshal bug in skaffold fix; upgrade skaffold or convert manually.');\n    // fallback: keep original config\n  } else throw e;\n}","preventionTips":["Keep skaffold updated to the latest release; marshal bugs are fixed upstream.","Avoid plugins/forks that inject non-standard fields into the config.","Pin a known-good skaffold version in CI to avoid surprise tool bugs.","If it reproduces, minimize the config and file an upstream issue with the repro."],"tags":["skaffold","yaml","serialization","config"],"backgroundTag":"yaml-marshal-failed","analyzedSha":"a1189de023efc32d4b8e11f395acc678aa555011","analyzedAt":"2026-09-05T12:09:27.064Z","contentChangedAt":"2026-09-05T12:09:27.064Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}