{"record":{"id":"2cacf541ec914118","repo":"go-playground/validator","slug":"patherror-from-os-stat","errorCode":null,"errorMessage":"*PathError from os.Stat","messagePattern":"\\*PathError from os\\.Stat","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"baked_in.go","lineNumber":2986,"sourceCode":"\t\t\t\tif t.Err == syscall.EINVAL {\n\t\t\t\t\t// It's definitely an invalid character in the path.\n\t\t\t\t\treturn false\n\t\t\t\t}\n\t\t\t\t// It could be a permission error, a does-not-exist error, etc.\n\t\t\t\t// Out-of-scope for this validation, though.\n\t\t\t\t// Lastly, we make sure it is a directory.\n\t\t\t\tif strings.HasSuffix(field.String(), string(os.PathSeparator)) {\n\t\t\t\t\treturn true\n\t\t\t\t} else {\n\t\t\t\t\treturn false\n\t\t\t\t}\n\t\t\tdefault:\n\t\t\t\t// Something went *seriously* wrong.\n\t\t\t\t/*\n\t\t\t\t\tPer https://pkg.go.dev/os#Stat:\n\t\t\t\t\t\t\"If there is an error, it will be of type *PathError.\"\n\t\t\t\t*/\n\t\t\t\tpanic(err)\n\t\t\t}\n\t\t}\n\t\t// We repeat the check here to make sure it is an explicit directory in case the above os.Stat didn't trigger an error.\n\t\tif strings.HasSuffix(field.String(), string(os.PathSeparator)) {\n\t\t\treturn true\n\t\t} else {\n\t\t\treturn false\n\t\t}\n\t}\n\n\tpanic(fmt.Sprintf(\"Bad field type %s\", field.Type()))\n}\n\n// isJSON is the validation function for validating if the current field's value is a valid json string.\nfunc isJSON(fl FieldLevel) bool {\n\tfield := fl.Field()\n\n\tswitch field.Kind() {","sourceCodeStart":2968,"sourceCodeEnd":3004,"githubUrl":"https://github.com/go-playground/validator/blob/facf128d2eecf42bd4ff447adc961aa21bb64aed/baked_in.go#L2968-L3004","documentation":"Panics inside the dir_path validator when os.Stat returns an error that is not one of the recognized syscall cases (e.g. not EINVAL for invalid characters and not a benign not-exist case). The code documents that os.Stat errors are *PathError values; hitting the default switch branch means something unexpectedly serious went wrong stat-ing the path (such as a path longer than the filesystem limit or an exotic I/O fault), so it panics with the raw error rather than silently passing or failing the validation.","triggerScenarios":"Thrown at baked_in.go:2986 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check the underlying *PathError to identify the real filesystem failure","Shorten the path if it exceeds the OS path-length limit","Ensure the process has the required permissions on parent directories","Wrap the validation call in a recover if untrusted paths must never crash the service"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"facf128d2eecf42bd4ff447adc961aa21bb64aed","analyzedAt":"2026-09-02T10:19:04.986Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T16:17:10.729Z"}