{"record":{"id":"cf8509d18d719edd","repo":"istio/istio","slug":"s-is-not-a-valid-value-path-element","errorCode":null,"errorMessage":"%s is not a valid value path element","messagePattern":"(.+?) is not a valid value path element","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"operator/pkg/util/path.go","lineNumber":150,"sourceCode":"\tkv := splitEscaped(pe, kvSeparatorRune)\n\treturn kv[0], kv[1], nil\n}\n\n// PathV returns the value string part of the entire value path element.\n// It returns an error if pe is not a value path element.\nfunc PathV(pe string) (string, error) {\n\t// For :val, return the value only\n\tif IsVPathElement(pe) {\n\t\tv, _ := RemoveBrackets(pe)\n\t\treturn v[1:], nil\n\t}\n\n\t// For key:val, return the whole thing\n\tv, _ := RemoveBrackets(pe)\n\tif len(v) > 0 {\n\t\treturn v, nil\n\t}\n\treturn \"\", fmt.Errorf(\"%s is not a valid value path element\", pe)\n}\n\n// PathN returns the index part of the entire value path element.\n// It returns an error if pe is not an index path element.\nfunc PathN(pe string) (int, error) {\n\tif !IsNPathElement(pe) {\n\t\treturn -1, fmt.Errorf(\"%s is not a valid index path element\", pe)\n\t}\n\tv, _ := RemoveBrackets(pe)\n\treturn strconv.Atoi(v)\n}\n\n// RemoveBrackets removes the [] around pe and returns the resulting string. It returns false if pe is not surrounded\n// by [].\nfunc RemoveBrackets(pe string) (string, bool) {\n\tif !strings.HasPrefix(pe, \"[\") || !strings.HasSuffix(pe, \"]\") {\n\t\treturn \"\", false\n\t}","sourceCodeStart":132,"sourceCodeEnd":168,"githubUrl":"https://github.com/istio/istio/blob/8dc789c5cf17517c64e3c36cb3288230f149dfae/operator/pkg/util/path.go#L132-L168","documentation":"util.PathV extracts the value part of a bracketed path element. It accepts '[:value]' (value-only) and returns the whole 'key:value' otherwise; the error fires only when RemoveBrackets yields nothing — i.e. the element is empty or not of the form '[...]'. It usually surfaces wrapped as 'path %s: %s' when tpath tries to match leaf-list elements.","triggerScenarios":"Calling PathV with an unbracketed element ('somekey'), an empty string, or a malformed '['-only fragment; in tpath traversal, a leaf list in the tree being traversed with a path element that lacks brackets.","commonSituations":"Hand-built paths passed to tpath/util APIs without the bracket convention; overlays where a list path was written as plain dotted segments; programmatic callers assuming PathV tolerates bare keys.","solutions":["Wrap list-selector elements in brackets: use '[value]' or '[key:value]' instead of the bare form","Validate elements with util.IsVPathElement / util.IsValidPathElement before building the path","For leaf-list matching pass '[:value]' so PathV returns just the value part"],"exampleFix":"// before\nutil.PathV(\"mypod\")\n// after\nutil.PathV(\"[:mypod]\")","handlingStrategy":"validation","validationCode":"if !util.IsVPathElement(pe) && !util.IsKVPathElement(pe) {\n    return fmt.Errorf(\"element %q is not a bracketed [value] or [key:value] element\", pe)\n}","typeGuard":"func isBracketed(pe string) bool {\n    _, ok := util.RemoveBrackets(pe)\n    return ok\n}","tryCatchPattern":"v, err := util.PathV(pe)\nif err != nil {\n    return fmt.Errorf(\"leaf-list matching requires bracketed elements like [:value]: %w\", err)\n}","preventionTips":["Always bracket list-selector elements; bare segments are treated as map keys elsewhere and fail here","Use '[:value]' for leaf-list matching so PathV strips the leading colon"],"tags":["istio","operator","path-syntax","go"],"backgroundTag":null,"analyzedSha":"8dc789c5cf17517c64e3c36cb3288230f149dfae","analyzedAt":"2026-08-15T15:16:55.434Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}