projectdiscovery/nuclei · error

keys must be []string or []interface{}, got %T

Error message

keys must be []string or []interface{}, got %T

What it means

Error "keys must be []string or []interface{}, got %T" thrown in projectdiscovery/nuclei.

Source

Thrown at pkg/js/libs/redis/redis.go:224

	keysSlice := []string{}
	if keys != nil {
		switch v := keys.(type) {
		case []string:
			keysSlice = v
		case []interface{}:
			keysSlice = make([]string, 0, len(v))
			for _, item := range v {
				keysSlice = append(keysSlice, fmt.Sprintf("%v", item))
			}
		case string:
			// the goja runtime zero-fills omitted trailing JS arguments with
			// the previous parameter's type, so a 4-arg call (old signature)
			// delivers "" here: treat it as no keys (backwards compat)
			if v != "" {
				return nil, fmt.Errorf("keys must be []string or []interface{}, got string")
			}
		default:
			return nil, fmt.Errorf("keys must be []string or []interface{}, got %T", keys)
		}
	}

	// Convert interface{} args to []interface{} for Eval (handle backwards
	// compatibility). Non-string items (numbers, booleans from JavaScript)
	// are stringified rather than dropped: Redis ARGV values are always
	// bulk strings on the Lua side, so "123"/"true" match JS expectations.
	argsInterface := []interface{}{}
	if args != nil {
		switch v := args.(type) {
		case []string:
			argsInterface = make([]interface{}, len(v))
			for i, arg := range v {
				argsInterface[i] = arg
			}
		case []interface{}:
			argsInterface = make([]interface{}, len(v))
			for i, item := range v {

View on GitHub (pinned to 265b3a3dec)

When it happens

Trigger: Thrown at pkg/js/libs/redis/redis.go:224 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of projectdiscovery/nuclei@265b3a3dec (2026-08-15). Data as JSON: /api/errors/92fa7893abb7d937. Report an issue: GitHub.