{"id":"ad246e279fa935d6","repo":"go-redis/redis","slug":"bitfieldro-invalid-number-of-arguments-must-be-e","errorCode":null,"errorMessage":"BitFieldRO: invalid number of arguments, must be even","messagePattern":"BitFieldRO: invalid number of arguments, must be even","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"bitmap_commands.go","lineNumber":188,"sourceCode":"\targs := make([]interface{}, 2, 2+len(values))\n\targs[0] = \"bitfield\"\n\targs[1] = key\n\targs = appendArgs(args, values)\n\tcmd := NewIntSliceCmd(ctx, args...)\n\t_ = c(ctx, cmd)\n\treturn cmd\n}\n\n// BitFieldRO - Read-only variant of the BITFIELD command.\n// It is like the original BITFIELD but only accepts GET subcommand and can safely be used in read-only replicas.\n// - BitFieldRO(ctx, key, \"<Encoding0>\", \"<Offset0>\", \"<Encoding1>\",\"<Offset1>\")\nfunc (c cmdable) BitFieldRO(ctx context.Context, key string, values ...interface{}) *IntSliceCmd {\n\targs := make([]interface{}, 2, 2+len(values))\n\targs[0] = \"BITFIELD_RO\"\n\targs[1] = key\n\tif len(values)%2 != 0 {\n\t\tc := NewIntSliceCmd(ctx)\n\t\tc.SetErr(errors.New(\"BitFieldRO: invalid number of arguments, must be even\"))\n\t\treturn c\n\t}\n\tfor i := 0; i < len(values); i += 2 {\n\t\targs = append(args, \"GET\", values[i], values[i+1])\n\t}\n\tcmd := NewIntSliceCmd(ctx, args...)\n\t_ = c(ctx, cmd)\n\treturn cmd\n}\n","sourceCodeStart":170,"sourceCodeEnd":198,"githubUrl":"https://github.com/go-redis/redis/blob/36d97525cd8076aed67cddf54778e9ea84550929/bitmap_commands.go#L170-L198","documentation":"Error \"BitFieldRO: invalid number of arguments, must be even\" thrown in go-redis/redis.","triggerScenarios":"Thrown at bitmap_commands.go:188 when the library encounters an invalid state.","commonSituations":"Construct BitFieldRO argument pairs in a loop over structs so a dangling half-pair is impossible.","solutions":["Provide an even number of field-spec arguments to BitFieldRO (each GET needs a type and an offset)","Ensure the slice you spread into the call has length divisible by 2"],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"36d97525cd8076aed67cddf54778e9ea84550929","analyzedAt":"2026-08-06T01:08:27.376Z","schemaVersion":2}