{"record":{"id":"cd0e1c1fa1d08251","repo":"XTLS/Xray-core","slug":"invalid-send-variant-index-d","errorCode":null,"errorMessage":"invalid send variant index: %d","messagePattern":"invalid send variant index: (.+?)","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"transport/internet/finalmask/xmc/padding.go","lineNumber":277,"sourceCode":"\t\t}\n\t\ttargetLength, err := randomPaddingTarget(minimum, maximum)\n\t\treturn targetLength, nil, nil, err\n\t}\n\n\tindices := turn.sendVariants\n\tif len(indices) == 0 {\n\t\tindices = make([]int, len(turn.variants))\n\t\tfor i := range indices {\n\t\t\tindices[i] = i\n\t\t}\n\t}\n\tselected, err := randomPaddingIndex(len(indices))\n\tif err != nil {\n\t\treturn 0, nil, nil, err\n\t}\n\tvariantIndex := indices[selected]\n\tif variantIndex < 0 || variantIndex >= len(turn.variants) {\n\t\treturn 0, nil, nil, fmt.Errorf(\"invalid send variant index: %d\", variantIndex)\n\t}\n\tvariant := turn.variants[variantIndex]\n\ttargetLength := paddingVariantLength(variant)\n\tchunks, delays, err := trimPaddingPrefix(variant, prefixLength)\n\tif err != nil {\n\t\treturn 0, nil, nil, err\n\t}\n\treturn targetLength, chunks, delays, nil\n}\n\nfunc trimPaddingPrefix(variant paddingVariant, prefixLength int) ([]int, []paddingDelayRange, error) {\n\tremainingPrefix := prefixLength\n\tfirstChunk := 0\n\tfor firstChunk < len(variant.chunks) && remainingPrefix > 0 {\n\t\tchunkLength := variant.chunks[firstChunk]\n\t\tif remainingPrefix < chunkLength {\n\t\t\treturn nil, nil, fmt.Errorf(\"prefix length %d splits chunk %d\", prefixLength, firstChunk)\n\t\t}","sourceCodeStart":259,"sourceCodeEnd":295,"githubUrl":"https://github.com/XTLS/Xray-core/blob/7d214f8b094f75322fa3990f8aadad1c912f24f5/transport/internet/finalmask/xmc/padding.go#L259-L295","documentation":"Error \"invalid send variant index: %d\" thrown in XTLS/Xray-core.","triggerScenarios":"Thrown at transport/internet/finalmask/xmc/padding.go:277 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7d214f8b094f75322fa3990f8aadad1c912f24f5","analyzedAt":"2026-08-15T14:26:24.325Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}