docker/cli · error

invalid type %T for secret

Error message

invalid type %T for secret

What it means

Error "invalid type %T for secret" thrown in docker/cli.

Source

Thrown at cli/compose/loader/loader.go:747

				ports = append(ports, value)
			default:
				return data, fmt.Errorf("invalid type %T for port", value)
			}
		}
		return ports, nil
	default:
		return data, fmt.Errorf("invalid type %T for port", entries)
	}
}

var transformStringSourceMap TransformerFunc = func(data any) (any, error) {
	switch value := data.(type) {
	case string:
		return map[string]any{"source": value}, nil
	case map[string]any:
		return data, nil
	default:
		return data, fmt.Errorf("invalid type %T for secret", value)
	}
}

var transformBuildConfig TransformerFunc = func(data any) (any, error) {
	switch value := data.(type) {
	case string:
		return map[string]any{"context": value}, nil
	case map[string]any:
		return data, nil
	default:
		return data, fmt.Errorf("invalid type %T for service build", value)
	}
}

var transformServiceVolumeConfig TransformerFunc = func(data any) (any, error) {
	switch value := data.(type) {
	case string:
		return volumespec.Parse(value)

View on GitHub (pinned to e9452d6e78)

When it happens

Trigger: Thrown at cli/compose/loader/loader.go:747 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of docker/cli@e9452d6e78 (2026-08-01). Data as JSON: /data/errors/534683abc2458df8.json. Report an issue: GitHub.